bluuebunny/crossref_metadata_2025_split huggingface dataset:
ChemInform Abstract: Nickel‐Catalyzed Formation of Fluorine‐Containing Ketones via the Selective Cross‐Trimerization Reaction of Tetrafluoroethylene, Ethylene, and Aldehydes.
Authors: Ohashi Masato , Shirataki Hiroshi , Kikushima Kotaro , Ogoshi Sensuke 
Published: September 2015

AbstractA wide range of 4,4,5,5‐tetrafluoro‐1‐pentanone derivatives are obtained.
ChemInform Abstract: Arene Oxidation with Malonoyl Peroxides.
Authors: Dragan Andrei , Kubczyk Tomasz M. , Rowley Julian H. , Sproules Stephen , Tomkinson Nicholas C. O. 
Published: September 2015

AbstractMalonoyl peroxide (II) is found to be an efficient reagent for the oxidation of arenes at room temperature or slightly elevated temperatures to furnish protected phenols.
ChemInform Abstract: Eco‐Friendly Solvents for Palladium‐Catalyzed Desulfitative C—H Bond Arylation of Heteroarenes.
Authors: Hfaiedh Anoir , Yuan Kedong , Ben Ammar Hamed , Ben Hassine Bechir , Soule Jean‐Francois , Doucet Henri 
Published: September 2015

AbstractUsing arylsulfonyl chlorides, arylation proceeds with remarkable regioselectivity: furans, benzofurans and N‐alkyl/phenyl‐pyrrols give C2‐arylated products while thiophenes and benzothiophenes give the C3‐arylated products.
ChemInform Abstract: Formation of Contiguous Quaternary and Tertiary Stereocenters by Sequential Asymmetric Conjugate Addition of Grignard Reagents to 2‐Substituted Enones and Mg—Enolate Trapping.
Authors: Germain Nicolas , Alexakis Alexandre 
Published: September 2015

AbstractOptimized reaction conditions are developed for the asymmetric conjugate addition of Grignard reagents to α‐substituted cyclic enones.
ChemInform Abstract: Copper‐Mediated Aryloxylation and Vinyloxylation of β‐C(sp3)—H Bond of Propionamides with Organosilanes.
Authors: Zhang Jitan , Chen Hui , Wang Binjie , Liu Zhanxiang , Zhang Yuhong 
Published: September 2015

AbstractThe new approach involves a sequential oxidation and arylation/vinylation process with assistance of an 8‐aminoquinolyl auxiliary.
ChemInform Abstract: Straightforward Syntheses of Nitriles, Acrylates, and Acrylamides in Aqueous Propan‐1,2‐diol: A Catalyst Free and Waste Free Methodology.
Authors: Jayalakshmi Lakshmi Narayanan , Karuppasamy Ayyanar , Stalindurai Kesavan , Sivaramakarthikeyan Ramar , Devadoss Vellasamy , Ramalingan Chennan 
Published: September 2015

AbstractStarting from aryl aldehydes, including pyrazole derivatives, and methylene active compounds a simple method for the E‐selective high yielding construction of olefins is developed.
ChemInform Abstract: (2‐Chlorobenzoyloxy)copper(I) Catalyzed C—S Cross‐Coupling of Di(hetero)aryl Disulfides with Aryl Boronic Acids under Base‐Free Conditions.
Authors: Guo Yan , Quan Zheng‐Jun , Da Yu‐Xia , Zhang Zhang , Wang Xi‐Cun 
Published: September 2015

AbstractArylboronic acids with strong electron‐withdrawing groups (e.g., 4‐CHO, 4‐Ac or 4‐COOH) do not react with compound (I) and also diallyl and di‐tert‐butyl disulfides fail in the reaction with (IIa).
ChemInform Abstract: A Direct Metal‐Free Decarboxylative Sulfono Functionalization (DSF) of Cinnamic Acids to α,β‐Unsaturated Phenyl Sulfones.
Authors: Singh Rahul , Allam Bharat Kumar , Singh Neetu , Kumari Kumkum , Singh Satish Kumar , Singh Krishna Nand 
Published: September 2015

AbstractA highly efficient decarboxylative synthesis of vinyl or alkynyl sulfones is achieved from cinnamic acids or propiolic acid derivatives and sulfonylhydrazides under mild reaction conditions.
ChemInform Abstract: The Search for Exceptions in the Highly Enantioselective Titanium Catalyzed Oxidation of Aryl Benzyl Sulfides.
Authors: Capozzi Maria Annunziata M. , Terraneo Giancarlo , Cavallo Gabriella , Cardellicchio Cosimo 
Published: September 2015

AbstractThe title reaction generally proceeds with high yields and provides the products with high stereoselectivity.
ChemInform Abstract: “(Diphosphine)Nickel”‐Catalyzed Negishi Cross‐Coupling: An Experimental and Theoretical Study.
Authors: Nicolas Emmanuel , Ohleier Alexia , D'Accriscio Florian , Pecharman Anne‐Frederique , Demange Matthieu , Ribagnac Philippe , Ballester Jorge , Gosmini Corinne , Mezailles Nicolas 
Published: September 2015

AbstractThe nickel‐based catalytic system performs a Negishi‐type cross‐coupling of aryl chlorides with equimolar arylzinc chlorides, demonstrating that strongly electron donating diphosphine ligands are excellent ligands for this process.
ChemInform Abstract: Catalyst Free, Multicomponent‐Tandem Synthesis of Spirooxindole‐indazolones and Spirooxindole‐pyrazolines: A Glycerol Mediated Green Approach.
Authors: Singh Swastika , Saquib Mohammad , Singh Shyam Babu , Singh Mandavi , Singh Jagdamba 
Published: September 2015

AbstractA glycerol‐water 4:1 mixture as green solvent allows the catalyst‐free synthesis of the title compounds from isatin (I), hydrazines (II) and either 1,3‐diketones (III) or phenyl ketones (V) in high yields.
ChemInform Abstract: Regio‐ and Diastereoselective Construction of 1′,2′‐(Dihydrospiro[indoline‐3,3′‐pyrrol]‐2′‐yl)acrylates Through Phosphine‐Catalyzed [4 + 1] Annulation of Morita—Baylis—Hillman Carbonates with Oxindole‐Derived α,β‐Unsaturated Imines.
Authors: Lei Yu , Zhang Xiao‐Nan , Yang Xue‐Yan , Xu Qin , Shi Min 
Published: September 2015

AbstractTitle compounds are regioselectively synthesized by this new phosphine‐catalyzed [4 + 1] annulation of Morita—Baylis—Hillman carbonates with oxindole‐derived α,β‐unsaturated imines.
ChemInform Abstract: Stereoselective Synthesis of 1‐Methyl‐3′,4′,5′,6′‐tetrahydrospiro[indoline‐3,2′‐pyran]‐2‐one Derivatives via Prins Cyclization.
Authors: Damera Krishna , Yu Bingchen , Wang Binghe 
Published: September 2015

AbstractSpirooxindole alcohols (III) and fluorides (IV) are readily prepared as single diastereomers by a Lewis acid promoted Prins cyclization of 3‐allyl‐3‐hydroxy indolinones (I) with aldehydes (II).
ChemInform Abstract: Intramolecular Cooperative C—C Bond Cleavage Reaction of 1,3‐Dicarbonyl Compounds with 2‐Iodoanilines to Give o‐(N‐Acylamino)aryl Ketones and Multisubstituted Indoles.
Authors: Xing Qi , Lv Hui , Xia Chungu , Li Fuwei 
Published: September 2015

AbstractAn ortho effect between C‐I and amine functionalities improves the reactivity of the coupling reaction of 2‐iodoanilines with 1,3‐dicarbonyl compounds.
ChemInform Abstract: Investigation of the Synthesis of Benzofuroindolines from N‐Hydroxyindoles: An O‐Arylation/[3,3]‐Sigmatropic Rearrangement Sequence.
Authors: Tomakinian Terry , Kouklovsky Cyrille , Vincent Guillaume 
Published: September 2015

AbstractN‐hydroxyindoles (II) are synthesized and utilized for the transformation into tryptamine‐derived benzofuroindolines involving a transition‐metal free O‐arylation with biaryliodonium salts followed by a spontaneous [3,3]‐sigmatropic rearrangement.
ChemInform Abstract: Enantioselective Gold Catalyzed Cascade Construction of Pyrroloindoline Derivatives.
Authors: Shen Zhu‐Qing , Li Xiao‐Xiao , Shi Jin‐Wei , Chen Bai‐Ling , Chen Zili 
Published: September 2015

AbstractThe reaction of tryptamines with allenoamides in the presence of BINOL‐derived phosphoramidate ligated gold catalysts provides pyrroloindolines with enantioselectivities up to 99%.
ChemInform Abstract: Non‐catalytic Solvent‐Free Synthesis of 5,6,7,8‐Tetrahydro‐4H‐chromenes from Aldehydes, Dimedone and Malononitrile at Ambient Temperature.
Authors: Elinson Michail N. , Ryzhkov Fedor V. , Zaimovskaya Tatiana A. , Egorov Mikhail P. 
Published: September 2015

AbstractTitle compounds are efficiently synthesized by simple grinding as mechanochemical activation.
ChemInform Abstract: Manganese(III) Acetate Mediated Oxidative Radical Cyclizations of α‐Substituted N‐[(E)‐Stilben‐2‐yl]acetamides.
Authors: Lin Ghien‐An , Chuang Che‐Ping 
Published: September 2015

AbstractThe title reaction provides 3‐substituted 2‐quinolines equipped with various functional groups under mild conditions and with high yields.
ChemInform Abstract: A Pd(II)‐Catalyzed C—H Activation Approach to Densely Functionalized N‐Heteroaromatics Related to Neocryptolepine and Their Evaluation as Potential Inducers of Apoptosis.
Authors: Sunke Rajnikanth , Kumar Vimal , Ashfaq Mohd Ashraf , Yellanki Swapna , Medisetti Raghavender , Kulkarni Pushkar , Shivaji Ramarao E. V. Venkat , Ehtesham Nasreen Z. , Pal Manojit 
Published: September 2015

AbstractCompounds (IIa)‐(IIc), (IIe), (IIf), (IVa), (IVb), (IVd), (IVe), (VII), and (X) are active in the sulforhodamine B assay (10 μM) against lung cancer A549 (<90% inhib.
ChemInform Abstract: Diastereoselective Construction of Highly Functionalized Tetrahydroquinolinoisoxazole Scaffolds via Intramolecular Nitrone Cycloaddition.
Authors: Bakthadoss Manickam , Devaraj Anthonisamy 
Published: September 2015

AbstractA diastereo‐ and regioselective construction of tetrahydroquinolinoisoxazoles (III) and (V) is achieved by reaction of Baylis—Hillman derivatives (I) and (IV) with N‐alkylhydroxylamine hydrochlorides.
ChemInform Abstract: A Visible Light Photocatalytic Cross‐Dehydrogenative Coupling/Dehydrogenation/6π‐Cyclization/Oxidation Cascade: Synthesis of 12‐Nitroindoloisoquinolines from 2‐Aryltetrahydroisoquinolines.
Authors: Rusch Fabian , Unkel Lisa‐Natascha , Alpers Dirk , Hoffmann Frank , Brasholz Malte 
Published: September 2015

AbstractA photolytic aerobic oxidative cyclization of 1‐nitromethyl substituted tetrahydroisoquinolines (I) and related pyridines (III) in the presence of 1‐aminoanthraquinone as the catalyst is developed to yield condensed nitropyrrole derivatives.
ChemInform Abstract: I2‐Catalyzed Aerobic Oxidative C(sp3)—H Amination/C—N Cleavage of Tertiary Amine: Synthesis of Quinazolines and Quinazolinones.
Authors: Yan Yizhe , Xu Ying , Niu Bin , Xie Huifang , Liu Yanqi 
Published: September 2015

AbstractA novel iodine‐catalyzed aerobic cyclization of o‐carbonyl anilines (I) and structurally related o‐aminobenzamides (IV) with TMEDA (II) as one‐carbon source is developed to give quinazolines (III) and quinazolinones (V).
ChemInform Abstract: Catalyst‐Free Three‐Component Domino Reactions for Regioselective Synthesis of Multi‐Functional Fused Pyrroles.
Authors: Chen Xue‐Bing , Yan Sheng‐Jiao , Su An , Liu Wei , Lin Jun 
Published: September 2015

AbstractStarting from heterocyclic ketene aminals, arylglyoxal monohydrates and 1,3‐diphenylpropane‐1,3‐dione an efficient domino [3 + 2]‐cyclization is developed which provides fused pyrrole derivatives in high yields and with excellent regioselectivity.
ChemInform Abstract: Highly Diastereoselective and Enantioselective Formal [4 + 3] Cycloaddition of Donor—Acceptor Cyclobutanes with Nitrones.
Authors: Hu Jiang‐Lin , Wang Lijia , Xu Hao , Xie Zuowei , Tang Yong 
Published: September 2015

AbstractA wide range of multifunctionalized optically active 1,2‐oxazepanes is efficiently obtained by the title reaction using a sterically hindered chiral SaBOX/Cu(II) complex as catalyst.
ChemInform Abstract: A Hydroxylated Lupeol‐Based Triterpenoid Ester Isolated from the Scurrula parasitica Parasitic on Nerium indicum
Authors: Liu Quan‐Yu , Wang Fei , Zhang Lei , Xie Jie‐Ming , Li Peng , Zhang Yong‐Hong 
Published: September 2015

Abstractisolation, structure elucidation and cytotoxic activity of the new terpenoid ester (I) and sixteen known compounds
ChemInform Abstract: Multicomponent Cascade Reactions of Unprotected Carbohydrates and Amino Acids.
Authors: Voigt Benjamin , Linke Michael , Mahrwald Rainer 
Published: September 2015

AbstractThe Ugi‐type reaction of carbohydrates such as (I), amino acids, and ethyl isocyanoacetate allows the synthesis of novel glycopeptide structures.
ChemInform Abstract: Recent Advances in the Synthesis of Fe3O4@Au Core/Shell Nanoparticles
Authors: Salihov Sergei V. , Ivanenkov Yan A. , Krechetov Sergei P. , Veselov Mark S. , Sviridenkova Natalia V. , Savchenko Alexander G. , Klyachko Natalya L. , Golovin Yury I. , Chufarova Nina V. , Beloglazkina Elena K. , et al.  
Published: September 2015

AbstractReview: 62 refs.
ChemInform Abstract: Configurationally Stable, Enantioenriched Organometallic Nucleophiles in Stereospecific Pd‐Catalyzed Cross‐Coupling Reactions: An Alternative Approach to Asymmetric Synthesis
Authors: Wang Chao‐Yuan , Derosa Joseph , Biscoe Mark R. 
Published: September 2015

AbstractReview: [28 refs.
Determination of the Enantiomerization Barrier of the Residual Enantiomers of C3‐Symmetric Tris[3‐(1‐Methyl‐2‐Alkyl)Indolyl]Phosphane Oxides: Case Study of a Multitasking HPLC Investigation Based on an Immobilized Polysaccharide Stationary Phase
Authors: Rizzo Simona , Menta Sergio , Benincori Tiziana , Ferretti Rosella , Pierini Marco , Cirilli Roberto , Sannicolò Francesco 
Published: September 2015

AbstractThe residual enantiomers of three tris‐(3‐indolyl)‐phosphane oxides bearing different alkyl groups (methyl, ethyl or i‐propyl) in position 2 of the indole rings constituting the blades were separated on the immobilized type Chiralpak IC column in polar organic and reversed‐phase modes. The good enantioselectivity and versatility of the IC CSP allowed easy isolation of the enantiomerically highly enriched samples suitable for configurational stability studies. The enantiomerization barriers of residual phosphane oxides were evaluated both by off‐column techniques (CD signal and enantiomeric purity decay kinetics) and by dynamic enantioselective high‐performance liquid chromatography (HPLC). Chirality 27:888–899, 2015. © 2015 Wiley Periodicals, Inc.
Nitrogen fixation by Pueraria lobata as a nitrogen source in the midstream sediment bar of a river
Authors: Asaeda Takashi , Rashid Md Harun , Ohta Kohske 
Published: September 2015

AbstractIt was assumed that the symbiotic N fixation in a floodplain site is highly affected by flood disturbances. To test this hypothesis, we collected soil and plant samples from several quadrats of the midstream flood plain of a relatively steep urbanized river that was subject to a different magnitude of flooding. Soil carbon and nitrogen contents had a significant positive correlation with the elevation of sites; i.e. they negatively correlated with a frequency of flood inundation. Soil pH values ranged between 6.0 and 7.23 at low elevation sites and 5.16 and 6.81 for high elevation sites. There was a significant difference (p < 0.001) in N fixation among sampling points, which suggests that flooding disturbs the process. A pH value of 6.5 is the best for N fixation; N fixation decreases while the pH increases or decreases. Site elevation also directly affected soil characteristics, especially nitrogen and carbon content. The fractionation of 15N value in leaf tissue (δ15N) suggests that N fixation is extensive when the total N (TN) is ≤ 0.3%. Below this TN, Pueraria lobata can derive up to 80% of their TN requirement from the atmosphere. Therefore, it can be concluded that site elevation, or flood pulses, affects the symbiotic N fixation in a floodplain by modifying the edaphic factors. Copyright © 2015 John Wiley & Sons, Ltd.
Calcium carbonate hydrogel construct with cynnamaldehyde incorporated to control inflammation during surgical procedure
Authors: Dewi Anne Handrini , Ana Ika Dewi , Jansen John 
Published: September 2015

AbstractThe incorporation of CaCO3hydrogel has been proven to enhance the bone biological activity of Plaster of Paris (POP) and to decrease its degradability. However, the installation of this bone substitute in a bone defect will still be associated with an inflammatory response. In this study, the influence of cinnamaldehyde as anti‐inflammatory agent, was investigated. In addition, it is known that aldehyde chains of cinnamaldehyde may also act as crosslinking agent and function as a plastisizer to the CaCO3hydrogel construct. Therefore, different concentrations of cinnamaldehyde were added to CaCO3hydrogel and the effect on the diametral tensile strength, age swelling, gel fractination, cinnamaldehyde release, antimicrobial effect, and cell cytotoxycity were investigated. The incorporation of cinnamaldehyde was found to decrease the age swelling and degradation rate of CaCO3hydrogel and to have no toxic effect to human gingival fibroblast cells. Moreover, the incorporation of cinnamaldehyde essential oil into the CaCO3hydrogel was beneficial and acted as an antiinflammatory agent. Further researchin vivois warranted to determine the final favorable effect of cinnamaldehyde incorporated CaCO3hydrogel in POP to provide a bone substitute. © 2015 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 104A: 768–774, 2016.
An engineered biocompatible drug delivery system enhances nerve regeneration after delayed repair
Authors: Tajdaran Kasra , Gordon Tessa , Wood Mathew D. , Shoichet Molly S. , Borschel Gregory H. 
Published: September 2015

AbstractLocalized drug delivery strategies could greatly benefit patients with peripheral nerve injury and could be easy for surgeons to implement. We developed a local drug delivery system (DDS) using drug‐loaded poly(lactic‐co‐glycolic acid) (PLGA) microspheres (MS) embedded in a fibrin gel. In an in vitro study, we investigated the biocompatibility of this DDS by performing a toxicity assay in which we incubated PC‐12 cells with the medium released from the DDS in vitro. In an in vivo study, this DDS was applied at the rat common peroneal (CP) nerve injury site to deliver exogenous glial cell line‐derived neurotrophic factor (GDNF) to the regenerating axons after delayed nerve repair. In vitro, PC‐12 cells incubated with released media samples from the DDS had similar viability to control cells cultured with normal media, demonstrating that the DDS was not toxic. In vivo, the numbers of motor and sensory neurons that regenerated their axons with empty MS treatment were the same as when there was no MS treatment. The DDS increased the numbers of regenerating motor‐ and sensory neurons to levels indistinguishable from those observed with immediate nerve repair. The DDS increased neuron regeneration to levels double those observed with negative control groups. This biocompatible, nontoxic, fibrin gel‐based DDS enhances outcomes following severe peripheral nerve injuries. © 2015 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 104A: 367–376, 2016.
Improved Livingness and Control over Branching in RAFT Polymerization of Acrylates: Could Microflow Synthesis Make the Difference?
Authors: Derboven Pieter , Van Steenberge Paul H. M. , Vandenbergh Joke , Reyniers Marie‐Francoise , Junkers Tanja , D'hooge Dagmar R. , Marin Guy B. 
Published: September 2015

The superior capabilities of structured microreactors over batch reactors are demonstrated for reversible addition–fragmentation chain transfer (RAFT) solution polymerization of n‐butyl acrylate with the aid of simulations, explicitly accounting for the chain length distribution of all macrospecies types. Since perfect isothermicity can be established in a microreactor, less side products due to backbiting and β‐scission are formed compared to the batch operation in which ineffective heat removal leads to an undesirable temperature spike. For a given RAFT chain transfer agent (CTA), additional microstructural control results under microflow conditions by optimizing the reaction temperature, lowering the dilution degree, or decreasing the initial molar ratio of monomer to RAFT CTA.
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Multidetector computed tomography angiography to evaluate the subscapular arterial tree
Authors: Şentürk Sadik , Efe Duran , Özkan Adem , Göncü Recep Gani , Zümrüt Murat 
Published: September 2015

ObjectiveThe subscapular artery has an important place in reconstructive surgery. The major pedicles of several different flaps used widely in reconstructive surgery take their roots from this arterial tree. This study aimed to provide anatomical data relating to these vessels through the use of multidetector computed tomography angiography (MDCTA) and to evaluate the clinical utility of MDCTA tool prior to surgery.Methods and MaterialsA radiological evaluation using a MDCTA was made of the bilateral subscapular arteries and branches measuring >0.5 mm in diameter that could be sufficiently identified as vascular structures in 92 patients (44 men and 48 women) with pneumonia, pleural effusion, lung masses, or nodules for which a thoracic MDCTA was requested for the purpose of diagnosis.ResultsThe mean diameter of the subscapular artery origin was 3.86 ± 0.60 mm on the left and 3.93 ± 0.62 mm on the right. The mean diameter of the circumflex scapular artery origin was 2.41 ± 0.37 mm on the left and 2.44 ± 0.39 mm on the right. The mean diameter of the thoracodorsal artery origin was 2.29 ± 0.27 mm on the left and 2.31 ± 0.29 mm on the right. Mean length of the circumflex scapular artery was 46.34 ± 9.41 mm on the left and 46.10 ± 8.81 mm on the right. Mean length of the latissimus dorsi branch of the thoracodorsal artery from the origin of the subscapular artery was 110.11 ± 17.42 mm on the left and 112.21 ± 14.60 mm on the right. Mean length of the serratus anterior branch was 124.25 ± 19.00 mm on the left and 120.84 ± 15.67 mm on the right. No differences were detected between the left and right sides or between sexes. Doubled circumflex scapular arteries were found in 4.3% of patients, and the circumflex scapular artery branched directly off the axillary artery in 3.2% of patients.ConclusionThis study showed that MDCTA is a highly valuable, non‐invasive imaging tool for studying vascular anatomy and detecting variations in vascular structure during preoperative planning, thus enhancing surgical safety. © 2015 Wiley Periodicals, Inc. Microsurgery 35:640–644, 2015.
A critical element of the light‐induced quaternary structural changes in YtvA‐LOV
Authors: Lee Rang , Gam Jongsik , Moon Jayoung , Lee Seung‐Goo , Suh Young‐Ger , Lee Bong‐Jin , Lee Jeeyeon 
Published: September 2015

AbstractYtvA, a photosensory LOV (light‐oxygen‐voltage) protein from Bacillus subtilis, exists as a dimer that previously appeared to undergo surprisingly small structural changes after light illumination compared with other light‐sensing proteins. However, we now report that light induces significant structural perturbations in a series of YtvA‐LOV domain derivatives in which the Jα helix has been truncated or replaced. Results from native gel analysis showed significant mobility changes in these derivatives after light illumination; YtvA‐LOV without the Jα helix dimerized in the dark state but existed as a monomer in the light state. The absence of the Jα helix also affected the dark regeneration kinetics and the stability of the flavin mononucleotide (FMN) binding to its binding site. Our results demonstrate an alternative way of photo‐induced signal propagation that leads to a bigger functional response through dimer/monomer conversions of the YtvA‐LOV than the local disruption of Jα helix in the As‐LOV domain.
“This is My Community”: Reproducing and Resisting Boundaries of Exclusion in Contested Public Spaces
Authors: Toolis Erin E. , Hammack Phillip L. 
Published: September 2015

AbstractThe way that public space is structured has significant implications for identity, social interaction, and participation in society. For those experiencing homelessness, with no or limited private space, survival hinges on the accessibility and livability of public space. However, the increasing privatization of public space in the United States has contributed to the implementation of anti‐homeless ordinances in cities, restricting sitting, standing, panhandling, and sleeping in public. This study analyzes data from interviews with housed and unhoused community members, text from a local policy document, and ethnographic observations to explore how boundaries between “insiders” and “outsiders” are drawn in public space and mediated through individual discourse. Our findings suggest that boundaries of exclusion are constructed through dominant narratives that portray the unhoused as a threat to safety and economic vitality, thus justifying the need for regulation and punishment through the criminalization of homelessness. Yet, informants also demonstrate resistance to this narrative by discussing how criminalization of homelessness perpetuates dehumanization, violence, and economic inequality. Policy implications for the regulation of public space are discussed.