bluuebunny/crossref_metadata_2025_split huggingface dataset:
ChemInform Abstract: An Unexpected Disproportional Reaction of 2H‐Azirines Giving (1E,3Z)‐2‐Aza‐1,3‐dienes and Aromatic Nitriles in the Presence of Nickel Catalysts.
Authors: Okamoto Kazuhiro , Mashida Ayano , Watanabe Masahito , Ohe Kouichi 
Published: July 2012

AbstractDiarylaziridines (I) unexpectedly undergo Ni‐catalyzed disproportionation to afford azabutadienes (II) and benzonitriles.
ChemInform Abstract: One‐Pot Synthesis of Useful Heterocycles in Medicinal Chemistry Using a Cascade Strategy.
Authors: Wu Guiyong , Yin Weiyu , Shen Hong C. , Huang Yong 
Published: July 2012

AbstractThe Claisen reaction of arylacetic acids (I) with esters (II) is accompanied by a spontaneous decarboxylation to afford ketones (III).
ChemInform Abstract: Difluoro(phenylchalcogen)methylation of Aldehydes, Ketones, and Imines with S‐, Se‐, and Te‐Containing Reagents PhXCF2H (X: S, Se, Te).
Authors: Hu Mingyou , Wang Fei , Zhao Yanchuan , He Zhengbiao , Zhang Wei , Hu Jinbo 
Published: July 2012

AbstractThe relative reactivity of sulfur‐, selenium‐, and tellurium‐containing (phenylchalcogen)difluoromethylation reagents towards aldehydes, ketones, and imines is investigated.
ChemInform Abstract: Well‐Defined (N‐Heterocyclic Carbene)—Ag(I) Complexes as Catalysts for A3 Reactions.
Authors: Chen Ming‐Tsz , Landers Brant , Navarro Oscar 
Published: July 2012

AbstractA general method for the A3 coupling of unactivated alkyl and aryl aldehydes in open air, in technical grade MeOH, and without any purification of the coupling partners is described with in very short reaction times.
ChemInform Abstract: α,α‐Difluoro‐α‐phenylsulfanyl‐α‐trimethylsilylme thane as “·CF2‐” Synthetic Building Block for the Preparation of gem‐Difluoromethylenated Cyclopentanols.
Authors: Peewasan Krisana , Kuhakarn Chutima , Soorukram Darunee , Tuchinda Patoomratana , Reutrakul Vichai , Pohmakotr Manat 
Published: July 2012

AbstractThe pathway to gem‐difluoro cyclopentanols (IV) and (V) involves sequential fluoride‐catalyzed addition of difluoro(phenylsulfanyl)trimethylsilylmethane (II) to homoallylic ketones (I) and subsequent intramolecular radical cyclization.
ChemInform Abstract: Cationic Pd(II)‐Catalyzed Highly Enantioselective Arylative Cyclization of Alkyne‐Tethered Enals or Enones Initiated by Carbopalladation of Alkynes with Arylboronic Acids.
Authors: Shen Kun , Han Xiuling , Lu Xiyan 
Published: July 2012

AbstractOptimized conditions are developed for the title reaction which proceeds through a Pd catalytic cycle without the necessity of a redox system.
ChemInform Abstract: Access to “Friedel—Crafts‐Restricted” tert‐Alkyl Aromatics by Activation/Methylation of Tertiary Benzylic Alcohols.
Authors: Hartsel Joshua A. , Craft Derek T. , Chen Qiao‐Hong , Ma Ming , Carlier Paul R. 
Published: July 2012

AbstractTreatment of tertiary benzylic alcohols with SOCl2 or HCl followed by reaction with AlMe3 or AlEt3 allows access to various tert‐alkyl benzenes.
ChemInform Abstract: Green, Mild and Efficient Bromination of Aromatic Compounds by HBr Promoted by trans‐3,5‐Dihydroperoxy‐3,5‐dimethyl‐1,2‐dioxolane in Water as a Solvent.
Authors: Khosravi Kaveh , Kazemi Samira 
Published: July 2012

AbstractSelective monobromination as well as di‐ or tribromination of a variety of phenols and anilines is achieved with PED.
ChemInform Abstract: O‐Acylation of Substituted Phenols with Various Alkanoyl Chlorides under Phase‐Transfer Catalyst Conditions.
Authors: Simion Alina Marieta , Hashimoto Iwao , Mitoma Yoshiharu , Egashira Naoyoshi , Simion Cristian 
Published: July 2012

AbstractThe title method is rapid, extremely effective and superior to previously described procedures.
ChemInform Abstract: Catalyst‐Free Synthesis of α‐Aminoacyl‐amides via N,N′‐Bis(phenylmethylidene)phenylmethanediamine as Imine Surrogate in Ugi Multicomponent Reaction.
Authors: Alizadeh Abdolali , Mokhtari Javad 
Published: July 2012

AbstractAdvantages of the title procedure are the ready availability of the starting materials, the mild conditions and the easy work‐up.
ChemInform Abstract: N‐Tosylcarboxamide as a Transformable Directing Group for Pd‐Catalyzed C—H ortho‐Arylation.
Authors: Peron Florent , Fossey Christine , Cailly Thomas , Fabis Frederic 
Published: July 2012

AbstractIt is demonstrated that the N‐tosylcarboxamide group allows the efficient coupling of the ortho arene position to offer a variety of functionalized biaryls.
ChemInform Abstract: A Simple, Efficient and Green Procedure for the Synthesis of Bis‐indolyl Methanes in 1,1,1,3,3,3‐Hexafluoro‐2‐propanol.
Authors: Khaksar Samad , Talesh Saeed Mohammadzadeh 
Published: July 2012

AbstractCondensation of aldehydes (II) with indoles (I) and (VII) provides the bis‐indolyl methanes (III) and (VIII), resp., in high yields without formation of any side products.
ChemInform Abstract: Copper‐Catalyzed Arylation of Indolin‐2,3‐ones with Arylboronic Acids.
Authors: Zhang Jilei , Chen Jiuxi , Ding Jinchang , Liu Miaochang , Wu Huayue 
Published: July 2012

AbstractThe new protocol shows broad functional group tolerance and uses an inexpensive ligand.
ChemInform Abstract: Copper(I)‐Catalyzed, One‐Pot Synthesis of Multisubstituted Indoles from 2‐Iodoanilines and Ethyl Buta‐2,3‐dienoate.
Authors: Wang Xianxue , Liu Jin , Guo Han , Ma Chao , Gao Xiai , Zhou Kang , Huang Guosheng 
Published: July 2012

AbstractThe reaction of a broad spectrum of iodoanilines with title ester (II) and some analogues allows the access to the synthetically and biologically important indole skeleton under mild conditions.
ChemInform Abstract: A Palladium‐Catalyzed One‐Pot Procedure for the Regioselective Dimerization and Cyanation of Indoles.
Authors: Kianmehr Ebrahim , Ghanbari Mohammad , Faghih Nasser , Rominger Frank 
Published: July 2012

AbstractThe procedure affords 3‐cyanated bisindoles of type (III)/(IV).
ChemInform Abstract: Synthesis of Novel 2,2‐Disubstituted Naphthodioxoles via an Unprecedented Reaction.
Authors: Kumar Satish , Pallvi Pallvi , Chadha Shally , Dham Sumita , Hundal Tanya , Kapoor Kamal K. 
Published: July 2012

AbstractBase promoted reaction of 2,3‐dihydroxynaphthalene (I) with 2,3‐dibromocarbonyl compounds (II) gives 2,2‐disubstituted naphthodioxoles (III) rather than naphthodioxins.
ChemInform Abstract: Efficient Synthesis of 4‐Phosphinoyl‐4,5,6,7‐tetrahydro‐2H‐indazol‐3‐ylamines.
Authors: Jelaiel Nourchaine , Comoy Corinne , Fernette Brigitte , Efrit Mohamed Lofti , Fort Yves 
Published: July 2012

AbstractThe title compounds are prepared in a three‐step sequence which involves nucleophilic addition of hydrazines to β‐ketothiamides as the key step.
ChemInform Abstract: Ugi/Robinson—Gabriel Reactions Toward the Synthesis of 2,4,5‐Trisubstituted Oxazoles.
Authors: Shaw Arthur Y. , Xu Zhigang , Hulme Christopher 
Published: July 2012

AbstractA two‐step sequence which involves Ugi four‐component reaction is followed by acid‐mediated debenzylation/cyclization of the resulting products (V) or (X).
ChemInform Abstract: Divergent Synthesis of Benzo[d]thiazoles by PIFA‐Mediated Cyclization of β‐Oxo Thioamides.
Authors: Huang Peng , Fu Xiaolan , Liang Yongju , Zhang Rui , Dong Dewen 
Published: July 2012

AbstractA mild and facile synthesis of the title compounds from readily available starting materials is presented.
ChemInform Abstract: Synthesis of Novel 2‐Mercapto Benzothiazole and 1,2,3‐Triazole Based Bis‐Heterocycles: Their Antiinflammatory and Antinociceptive Activities.
Authors: Shafi Syed , Alam Mohammad Mahboob , Mulakayala Naveen , Mulakayala Chaitanya , Vanaja G. , Kalle Arunasree M. , Pallu Reddanna , Alam M. S. 
Published: July 2012

AbstractA library of novel bis‐heterocycles (III) encompassing 2‐mercapto benzothiazole and 1,2,3‐triazoles are synthesized using click chemistry approach.
ChemInform Abstract: Manganese(III) Acetate Mediated Free‐Radical Phosphonylation of Flavones and Coumarins.
Authors: Zhou Peng , Jiang Yao‐Jia , Zou Jian‐Ping , Zhang Wei 
Published: July 2012

AbstractPhosphoryl radicals, generated by oxidation of diethyl phosphate with Mn(III) acetate, react selectively at the 3‐position to give products of biological interest.
ChemInform Abstract: A Catalytic Asymmetric Reaction Involving Enolizable Anhydrides.
Authors: Cornaggia Claudio , Manoni Francesco , Torrente Esther , Tallon Sean , Connon Stephen J. 
Published: July 2012

AbstractThe enolizable anhydride (I) can be coupled with various aromatic aldehydes under conditions A) to produce mainly trans‐configurated derivatives of type (IV) after esterification.
ChemInform Abstract: Microwave‐Assisted Chemoselective Reaction: A Divergent Synthesis of Pyrazolopyridine Derivatives with Different Substituted Patterns.
Authors: Wang Shu‐Liang , Liu Yin‐Ping , Xu Bi‐Hui , Wang Xing‐Hang , Jiang Bo , Tu Shu‐Jiang 
Published: July 2012

AbstractThe heterocyclization process affords different products by controlling the conditions.
ChemInform Abstract: Synthesis and Evaluation of Anticancer Activity of Some Novel 6‐Aryl‐2‐(p‐sulfamylphenyl)‐pyridazin‐3(2H)‐ones.
Authors: Rathish I. G. , Javed Kalim , Ahmad Shamim , Bano Sameena , Alam M. S. , Akhter Mymoona , Pillai K. K. , Ovais Syed , Samim Mohammed 
Published: July 2012

AbstractNovel pyridazones (III) bearing a benzenesulfonamide moiety are synthesized and evaluated for their anticancer activity toward human cancer cell lines.
ChemInform Abstract: Synthesis of Bromo‐, Boryl‐, and Stannyl‐Functionalized 1,2‐Bis(trimethylsilyl)benzenes via Diels—Alder or C—H Activation Reactions.
Authors: Reus Christian , Liu Nai‐Wei , Bolte Michael , Lerner Hans‐Wolfram , Wagner Matthias 
Published: July 2012

AbstractThe title compounds undergo derivatization and Pd‐catalyzed cross‐coupling to afford arenes like (IXa) and (XI).
ChemInform Abstract: Spherical Ordered Mesoporous Carbon Nanoparticles with High Porosity for Lithium—Sulfur Batteries.
Authors: Schuster Joerg , He Guang , Mandlmeier Benjamin , Yim Taeeun , Lee Kyu Tae , Bein Thomas , Nazar Linda F. 
Published: July 2012

AbstractSpherical ordered mesoporous nanoparticles (300 nm in diameter) are prepared by casting poly(methyl methacrylate) spheres with a silica precursor solution to form a silica inverse opal.
Energetic Evaluation of the Feeding‐in of Hydrogen into the Natural Gas Distribution System
Authors: Müller Karsten , Geng Jin , Völkl Johannes , Arlt Wolfgang 
Published: July 2012

AbstractDer zunehmende Ausbau erneuerbarer Energien erfordert einen raschen Aufbau chemischer Energiespeicher. Die Einspeisung von regenerativ erzeugtem Wasserstoff ins Erdgasnetz stellt eine Option hierfür dar. Eine thermodynamische Analyse zeigt, dass die Einspeisung ins Erdgasnetz verglichen mit anderen chemischen Speichertechnologien einen guten Gesamtwirkungsgrad aufweist. Aufgrund der beschränkten Aufnahmefähigkeit des Erdgasnetzes sind die erreichbaren Speicherkapazitäten zwar nicht ausreichend, um einen vollständigen Umstieg auf erneuerbare Energien zu ermöglichen, als Teil eines Maßnahmenbündels kann die Einspeisung aber übergangsweise einen Beitrag leisten.
Coupled finite difference and boundary element methods for fluid flow through a vessel with multibranches in tumours
Authors: Sun Qiang , Wu Guo Xiong 
Published: July 2012

SUMMARYA mathematical model and a numerical solution procedure are developed to simulate flow field through a 3D permeable vessel with multibranches embedded in a solid tumour. The model is based on Poisseuille's law for the description of the flow through the vessels, Darcy's law for the fluid field inside the tumour interstitium, and Starling's law for the flux transmitted across the vascular walls. The solution procedure is based on a coupled method, in which the finite difference method is used for the flow in the vessels and the boundary element method is used for the flow in the tumour. When vessels meet each other at a junction, the pressure continuity and mass conservation are imposed at the junction. Three typical representative structures within the tumour vasculature, symmetrical dichotomous branching, asymmetrical bifurcation with uneven radius of daughter vessels and trifurcation, are investigated in detail as case studies. These results have demonstrated the features of tumour flow environment by the pressure distributions and flow velocity field. Copyright © 2012 John Wiley & Sons, Ltd.
Reclaiming the energy of a schedule: models and algorithms
Authors: Aupy Guillaume , Benoit Anne , Dufossé Fanny , Robert Yves 
Published: July 2012

SUMMARYWe consider a task graph to be executed on a set of processors. We assume that the mapping is given, say by an ordered list of tasks to execute on each processor, and we aim at optimizing the energy consumption while enforcing a prescribed bound on the execution time. Although it is not possible to change the allocation of a task, it is possible to change its speed. Rather than using a local approach such as backfilling, we consider the problem as a whole and study the impact of several speed variation models on its complexity. For continuous speeds, we give a closed‐form formula for trees and series–parallel graphs, and we cast the problem into a geometric programming problem for general directed acyclic graphs. We show that the classical dynamic voltage and frequency scaling (DVFS) model with discrete modes leads to an NP‐complete problem, even if the modes are regularly distributed (an important particular case in practice, which we analyze as the incremental model). On the contrary, the Vdd‐hopping model that allows to switch between different supply voltages (VDD) while executing a task leads to a polynomial solution. Finally, we provide an approximation algorithm for the incremental model, which we extend for the general DVFS model. Copyright © 2012 John Wiley & Sons, Ltd.
Role of Amine Structure on Carbon Dioxide Adsorption from Ultradilute Gas Streams such as Ambient Air
Authors: Didas Stephanie A. , Kulkarni Ambarish R. , Sholl David S. , Jones Christopher W. 
Published: July 2012

AbstractA fundamental study on the adsorption properties of primary, secondary, and tertiary amine materials is used to evaluate what amine type(s) are best suited for ultradilute CO2 capture applications. A series of comparable materials comprised of primary, secondary, or tertiary amines ligated to a mesoporous silica support via a propyl linker are used to systematically assess the role of amine type. Both CO2 and water adsorption isotherms are presented for these materials in the range relevant to CO2 capture from ambient air and it is demonstrated that primary amines are the best candidates for CO2 capture from air. Primary amines possess both the highest amine efficiency for CO2 adsorption as well as enhanced water affinity compared to other amine types or the bare silica support. The results suggest that the rational design of amine adsorbents for the extraction of CO2 from ambient air should focus on adsorbents rich in primary amines.
One‐Step Hydrotreatment of Vegetable Oil to Produce High Quality Diesel‐Range Alkanes
Authors: Wang Congxin , Tian Zhijian , Wang Lei , Xu Renshun , Liu Qianhe , Qu Wei , Ma Huaijun , Wang Bingchun 
Published: July 2012

AbstractA one‐step hydrotreatment of vegetable oil combining deoxygenation and isomerization to directly produce low cloud point, high quality diesel is devised. The Pt/zeolite bifunctional catalysts prepared by using SAPO‐11 and ZSM‐22 zeolites as supports are used in this process. Catalytic reactions are conducted in a fixed‐bed reactor under a hydrogen atmosphere. Over the bifunctional catalyst, 100 % conversion of soybean oil is obtained at 357 °C, 4 MPa, and 1 h−1, and 80 % organic liquid yield is achieved, which is close to the maximum theoretical liquid yield. In the organic products, the alkanes selectivity is 100 % with an i‐alkanes selectivity above 63 %. NH3‐temperature programmed desorption (TPD), pyridine IR spectroscopy, and other characterization techniques are used to study the effect of the support acidity on the reaction pathway. Over the Pt/zeolite bifunctional catalyst with less strong Lewis acid sites, the reaction proceeds via the decarboxylation plus decarbonylation pathway. This one‐step method provides a new strategy to produce low cloud point, high quality diesel from biomass feedstock in a more economic and attractive way.
Metal(IV) Complexes [M(LN,O,S)2]n (M = Ru, Os) of a Redox‐Active o‐Amidophenolate Ligand (LN,O,S)2– with Coordinating Thioether Appendix
Authors: Hübner Ralph , Sarkar Biprajit , Fiedler Jan , Záliš Stanislav , Kaim Wolfgang 
Published: July 2012

AbstractComplexes [M(LN,O,S)2] [M = Ru, Os; (LN,O,S)2– = 4,6‐di‐tert‐butyl(2‐methylthiophenylamido)‐o‐phenolate] were obtained and structurally characterized as metal(IV) complexes with mer‐configured tridentate ligands. Two reversible oxidations and one (Os) or two (Ru) reversible reductions were investigated by EPR and UV/Vis/NIR spectroelectrochemistry. The first reduction leads to EPR‐silent MIII species, whereas the oxidation produces iminosemiquinone complexes with ligand‐centered spin and small‐metal participation at the singly occupied MO. Absorptions in the visible and near‐IR region are assigned with the help of time‐dependent (TD)‐DFT calculations.
Flexible Mono‐ and Bis‐tetraazamacrocyclic Complexes of Copper and Nickel Stabilizing Different Oxidation States
Authors: Domagała Sławomir , Małecka Joanna , Michałowicz Aleksandra , Mames Iwona , Kamieński Bohdan , Woźny Mateusz , Bilewicz Renata , Korybut‐Daszkiewicz Bohdan , Woźniak Krzysztof 
Published: July 2012

AbstractThe synthesis and structural properties of new mono‐ and bis‐macrocyclic cyclidene complexes of copper(II) andnickel(II) are presented. The compounds with aliphatic ligands are flexible enough to stabilize metal centers in the three oxidation states +1, +2, and +3. All the electron‐transfer processes in the 16‐membered mono‐ and binuclear macrocyclic complexes of copper(II) and nickel(II) were fast and reversible. Two polymorphic forms of the 16‐membered mononuclear complex of nickel(II) were isolated in the solid state and characterized. The 16‐membered macrocyclic complexes show both U‐ and Z‐shape conformations. The deviation of the macrocyclic ligand from planarity affects the electrochemical properties of the complexes and leads to stabilization of different oxidation states of the Cu and Ni metal centers. Substitution of the exocyclic nitrogen atoms with a second alkyl group increases the deviation from planarity and induces rotation of the functional groups at the meso position relative to the macrocyclic ring. In the bis‐macrocyclic complexes, the electron‐donating properties are improved and the formal potential of the metal(II)/metal(III) system is less positive with increasing linker length between the macrocyclic units. The acceptor properties of the metal(II) complexes are weaker, the formal potential of the metal(II)/metal(I) couple being shifted to more negative values.
Water‐Soluble Derivatives of Octanuclear Iron–Oxido–Pyrazolato Complexes – an Experimental and Computational Study
Authors: Das Soma , Chakraborty Indranil , Skachkov Dmitry , Ahmadi Majid , Ishikawa Yasuyuki , Baran Peter , Raptis Raphael G. 
Published: July 2012

AbstractTwo water‐soluble iron–pyrazolato complexes (compounds 3 and 4), [Fe8], have been prepared by introducing twelve hydroxyalkyl groups to the periphery of the approximately spherical octanuclear molecule. They are contrasted with their two organosoluble chloroalkyl analogues (compounds 1 and 2). All four complexes were characterized in solution by 1H NMR and electrospray ionization mass spectrometry. The one‐electron‐reduction product of water‐soluble 3, [Fe8]–, was structurally characterized by single‐crystal X‐ray diffraction analysis. In aqueous media, the four terminal Fe–Cl bonds of [Fe8] are partially hydrolyzed, and the resulting chlorido–aqua–hydroxido species form supramolecular nanoscale aggregates, as determined by dynamic light scattering and electron microscopy. Preliminary computational studies with DFT methods were employed to model the H‐bonding interactions controlling the competing solvation and aggregation processes.
How Can f‐Block Monocations Behave as Monocations of d‐Block Transition Metals?
Authors: Quemet Alexandre , Brennetot Rene , Salpin Jean‐Yves , Cimas Alvaro , Marsden Colin , Tortajada Jeanine , Vitorge Pierre 
Published: July 2012

AbstractThe electronic structures of LnNH+ species are studied by DFT (B3LYP) quantum calculations for the Ln = La, Eu and Gd 4f‐block elements (lanthanides). Ln≡N triple bonds of essentially d character are formed for La and Gd, which explains why La+ and Gd+ behave like ions of d‐block transition metals, as experimentally evidenced by mass spectrometry, and why the Ln+ reactivity is correlated with its electron‐promotion energy: the present theoretical study is a support to such a correlation and qualitative knowledge. The Ln+ + NH3 → LnNH3+ → transition state → HLn=NH2+ → transition state → Ln≡NH+ + H2 reaction pathway is calculated. The formation of H–Ln=NH2+ corresponds to the formation of new covalent bonds associated with more electron pairing and corresponding lowering of the spin multiplicity–spin crossing reaction. It is in this step that low electron‐promotion energy is required to promote a 4f electron into a 5d orbital as is typical for La+ and Gd+. A similar geometry, bonding and electronic configuration are calculated for NpNH+ – an actinide complex observed by mass spectrometry – with higher participation of 5f orbitals (20 % and 25 % for the σ and π bonds, respectively) as compared to the 4f orbitals (3 % and 8 %) of GdNH+: Gd+ and Np+ are the only lanthanide and actinide monocations with one s‐ and one d‐valence electrons in their ground states.
A Modular Synthesis of Polysubstituted Indolizines
Authors: Kucukdisli Murat , Opatz Till 
Published: July 2012

AbstractThe N‐alkylation of pyridines with cyanohydrin triflates or α‐halonitriles furnishes 1‐(1‐cyanoalkyl)pyridinium salts that can react with nitroolefins under basic conditions to furnish polysubstituted indolizines. Overall, the indolizine core can be constructed from a pyridine, two aldehydes, and a nitroalkane, and no undesired functional groups remain in the products. When bromoacetonitrile was used for the N‐alkylation, indolizine‐3‐carbonitriles were obtained instead. The pyridine component may be replaced by other azines, giving rise to related heterocyclic systems.
Total Synthesis of Gabosines
Authors: Mac Dinh Hung , Chandrasekhar Srivari , Grée René 
Published: July 2012

AbstractThis review reports on the total synthesis of gabosines, a family of secondary metabolites containing trihydroxylated cyclohexanone or cyclohexenone cores. Analysis of the different stategies used to prepare these natural products and their stereoisomers has been carried out with special attention paid to the methods employed for the formation of the carbocyclic ring. The different methods are compared in a table, and a discussion of future directions of research in this area is presented.
Synthesis of Flavones and γ‐Benzopyranones Using Mild Sonogashira Coupling and 18‐Crown‐6 Ether Mediated 6‐endo Cyclization
Authors: Chuang Da‐Wei , El‐Shazly Mohamed , Balaji D. Barve , Chung Yu‐Ming , Chang Fang‐Rong , Wu Yang‐Chang 
Published: July 2012

AbstractAn efficient method for the synthesis of flavones and γ‐benzopyranones has been developed utilizing a mild Sonogashira coupling and 18‐crown‐6 ether mediated 6‐endo cyclization of o‐alkynoylphenyl acetates. By using this strategy, flavones and γ‐benzopyranones bearing electron‐donating groups, halogens, and simple alkyl substituents were synthesized in satisfactory yields.