bluuebunny/crossref_metadata_2025_split huggingface dataset:
Reactivities of Stable Rotamers. XLI. Reactions of 1-(9-Fluorenyl)-2-(1-methylethenyl)naphthalene Rotamers with Chalcogenyl Halides and Observation of Coloration During the Reaction of Methanesulfenyl Chloride and the ap-Rotamer
Authors: Oki Michinori , Hirose Takanori , Kataoka Yasukazu , Ogata Taisuke , Toyota Shinji , Matsuo Takashi , Kawai Yasushi , Ohno Atsuyoshi 
Published: September 2003

Abstract
Reactions of p-toluenesulfenyl chloride with the title olefins in carbon tetrachloride afforded an addition product and sp-1-(9-fluorenyl)-2-[1-(p-tolylthiomethyl)ethenyl]naphthalene in the case of ap, whereas the only product was ap-1-(9-fluorenyl)-2-[1-(p-tolylthiomethyl)ethenyl]naphthalene in the case of sp. No cyclized compounds, which are commonly observed in the reactions of the sp-isomer with halogens or halogen chloride, were detected. Various unsuccessful attempts, including use of methanesulfenyl chloride to take advantage of different sulfur acidity, use of a soft anion to retard deprotonation or a polar solvent to accelerate cyclization by stabilizing the intervening cations, have been made to find conditions for formation of the cyclized compound. Similar unsuccessful results were obtained with benzeneselenenyl halides. Such results are attributed to the effective participation of a chalcogen atom in stabilizing a β-carbocation, which opens momentarily but is less vulnerable to the SN2 type attack of the existing nucleophile. Coloration was observed in the reaction of the sp form with methanesulfenyl chloride.
Theoretical Prediction of Isolable Fullerene Isomers
Authors: Aihara Jun-ichi 
Published: September 2003

Abstract
Isolable fullerene isomers must be kinetically very or fairly stable. It was found that both the minimum bond resonance energy (min BRE) and the highest occupied molecular orbital-lowest unoccupied molecular orbital (HOMO-LUMO) energy separation are useful for estimating the kinetic stability of fullerene molecules. A fullerene isomer must be difficult to isolate from the arc-produced soot if it has a min BRE of less than −0.100 |β| and/or a HOMO-LUMO energy separation smaller than 0.130 |β|. All fullerene isomers so far isolated are kinetically stable in this sense. Candidates for isolable fullerene isomers were chosen by evaluating these two indices.
Facile Synthesis of the Fused 6-6-5 Ring System Containing Chroman Ring from 2-(1-Hydroxy-5-alkenyl)phenol Derivatives via Intramolecular Inverse-Electron-Demand Diels–Alder Reaction
Authors: Shrestha Kedar Shanker , Honda Kiyoshi , Asami Masatoshi , Inoue Seiichi 
Published: September 2003

Abstract
A simple and facile synthesis of the fused 6-6-5 ring system, i.e., 1,2,3,3a,4,9b-hexahydrocyclopenta[c][1]benzopyrans, was achieved through the intramolecular [4+2] cycloaddition of o-quinonemethides generated from 2-(1-hydroxy-5-alkenyl)phenol derivatives under acidic conditions. In general, cis-fused tricyclic compounds of 6-6-5 ring system were obtained as the major products. Reactivity and selectivity of the cycloaddition reaction depended on the substituents on the aromatic ring and in the dienophilic olefin moiety.
Synthesis of Medium-Sized Bicyclic Compounds by Intramolecular Cyclization of Cyclic β-Keto Radicals Generated from Cyclopropanols Using Manganese(III) Tris(pyridine-2-carboxylate) and Its Application to Total Synthesis of 10-Isothiocyanatoguaia-6-ene
Authors: Iwasawa Nobuharu , Funahashi Masahiro , Hayakawa Satoshi , Ikeno Taketo , Narasaka Koichi 
Published: September 2003

Abstract
Bicyclic cyclopropanols having an olefinic side chain are oxidized with manganese(III) tris(pyridine-2-carboxylate) to generate cyclic β-keto radicals with ring-expansion. These cyclize intramolecularly, affording bicyclic radical intermediates. The cyclized radicals are trapped with various radical-trapping reagents such as electron-rich or -deficient olefins, tributylstannane and diphenyl diselenide to give the corresponding functionalized products. Stereochemistries of the bicyclic products are well predicted by MM2 force field calculation. A stereoselective total synthesis of an isothiocyano sesquiterpene, 10-isothiocyanatoguaia-6-ene, is achieved using this reaction.
Asymmetric Reduction of α-Keto Esters and α-Diketones with a Bakers’ Yeast Keto Ester Reductase
Authors: Kawai Yasushi , Hida Kouichi , Tsujimoto Munekazu , Kondo Shin-ichi , Kitano Kazutada , Nakamura Kaoru , Ohno Atsuyoshi 
Published: September 2003

Abstract
Optically pure α-hydroxy esters and α-hydroxy ketones have been synthesized by the reduction of the corresponding ketones with a keto ester reductase isolated from bakers’ yeast (YKER-I). The reduction of α-keto esters affords the corresponding (S)- or (R)-hydroxy esters selectively, where the stereochemical course depends on the chain length of the alkyl substituent on the carbonyl group. An α-keto short alkanoic ester affords the corresponding (S)-hydroxy ester, whereas a long alkanoate yields the corresponding (R)-hydroxy ester. The reduction of α-diketones affords the corresponding (S)-2-hydroxy ketones regio- and stereoselectively.
The Synthesis, Molecular Structure and Selectivity of Macrotricyclic Ammonium-ion Receptor for Bromide Ion
Authors: Ito Naohito , Izumi Mitsunori , Ichikawa Kazuhiko , Shiro Motoo 
Published: September 2003

Abstract
The cage receptor [R4N4(C5H10)2(C6H12)4]4+ ([566]RMQA4+) was designed and synthesized. X-ray crystallography, 1H-NMR and molecular mechanics calculation revealed the complexibility and selectivity toward Br−. In the presence of both Cl− and Br−, [566]RMQA4+ shows the higher selectivity toward Br− in aqueous solution.
Diastereoselection in Crystalline State Photochromism of a Diarylethene Having a Chiral Substituent
Authors: Kodani Tetsuhiro , Matsuda Kenji , Yamada Taro , Irie Masahiro 
Published: September 2003

Abstract
A diarylethene having a chiral substituent underwent a diastereoselective photocyclization reaction in the crystalline phase, while the selectivity was not observed in solution.
Effect of Hydrothermal Treatment of Titania-pillared Montmorillonite for Photocatalytic Degradation of Dibutyl Phthalate in Water
Authors: Yoshida Hisao , Kawase Tomomi , Miyashita Yoshinori , Murata Chizu , Ooka Chihiro , Hattori Tadashi 
Published: September 2003

Abstract
Titania-pillared clay could adsorb dibutyl phthalate (DBP), one of endocrine disruptors, and degrade it photocatalytically. Hydrothermal treatment of this material, which increased the crystallinity of titania pillars, enhanced the photocatalytic activity without losing the adsorption ability and reduced the elution of titania pillars.
Reactions of Vinyldisilanes with Ruthenium Carbonyl
Authors: Dai Xiaosu , Kano Naokazu , Kako Masahiro , Nakadaira Yasuhiro 
Published: September 2003

Abstract
Reaction of β-styrylpentamethyldisilane (1a) with Ru3(CO)12 afforded β-styryltrimethylsilane (2a) with elimination of a dimethylsilylene unit, while under similar conditions α-isomer 1b yielded 2a together with 1a. Studies on these reactions suggest the formation of silapropenyl and silylene ruthenium complexes as key intermediates.
Optically Active Aldiminato Cobalt(II) Complexes as Efficient Catalysts for Enantioselective Cyclopropanation of Styrenes with Diazoacetates
Authors: Yamada Tohru , Ikeno Taketo , Sekino Hiroyuki , Sato Mitsuo 
Published: September 2003

Abstract
The optically active cobalt(II) complex, MPAC, has proved to be efficient enantioselective catalyst for the cyclopropanation of styrenes with diazoacetates. The addition of a catalytic amount of N-methylimidazole remarkably accelerated the cyclopropanation reaction to improve both the chemical and optical yields of the product.
Long-Lived Charge Separation with High Quantum Yield in a Ferrocene-Porphyrin-Fullerene Triad
Authors: Fujitsuka Mamoru , Ito Osamu , Imahori Hiroshi , Yamada Koji , Yamada Hiroko , Sakata Yoshiteru 
Published: September 2003

Abstract
A ferrocene-porphyrin-C60 triad was prepared to mimic efficient photosynthetic multistep electron transfer system. Upon irradiation, the triad produced a long-lived charge-separated state with a high quantum yield, compared with the previously reported artificial photosynthetic triads. The lifetime of the charge separated state increased with increasing the solvent polarity. These results indicate that C60 is an excellent building block as an acceptor in light energy conversion systems.
Formation and Stability of New Hybrid Dichalcogena Dications(S-Se, S-Te and Se-Te) Bearing (2-Methylchalcogenomethyl)phenyl Skeleton
Authors: Naka Hiroyuki , Shindo Masayo , Maruyama Tetsushi , Sato Soichi , Furukawa Naomichi 
Published: September 2003

Abstract
Ethyl 2-(methylthiomethyl)phenyl selenide 1a, telluride 1b and ethyl 2-(methylselanylmethyl)phenyl telluride 1c were prepared and treated with 1 equivalent of triflic anhydride (Tf2O) or 2 equivalents of nitrosonium salts (NOBF4 or NOPF6) at low temperature to generate the corresponding selenathia, tellurathia and telluraselena dications(2a, 2b and 2c), the structures of which were determined by NMR spectroscopy and 2b was successfully isolated.
Electrochemical Evaluation of Interaction between Avidin and Biotin Self-assembled Using Marker Ions
Authors: Kuramitz Hideki , Sugawara Kazuharu , Nakamura Hiroshi , Tanaka Shunitz 
Published: September 2003

Abstract
The interaction between avidin and biotin as self-assembled monolayer on a gold electrode surface was electrochemically evaluated by monitoring the changes in the electrode response of the ferrocyanide ion as redox-marker. It was clarified that the permeability changes of avidin membrane introduced onto the biotin self-assembled monolayer against ferrocyanide ion were ascribed to electrostatic interaction between avidin and marker ion.
Synthesis and Crystal Structure of New Sulfate-Bridged Coordination Polymer, {(4,4′-bpyH2)[Fe3(4,4′-bpy)3(SO4)4(H2O)6]·10H2O}n (4,4′-bpy = 4,4′-Bipyridine). Three-Dimensional Network with Microporous Channels
Authors: Noro Shin-ichiro , Kondo Mitsuru , Kitagawa Susumu , Ishii Tomohiko , Matsuzaka Hiroyuki 
Published: September 2003

Abstract
A new sulfate-bridged coordination polymer, {(4,4′-bpyH2)[Fe3(4,4′-bpy)3(SO4)4(H2O)6]·10H2O}n, was synthesized and crystallographically characterized. This complex shows a novel three-dimensional (3-D) log-cabin type structure constructed from one-dimensional (1-D) [Fe(4,4′-bpy)(H2O)2]n cationic chain, free protonated 4,4′-bpy, and sulfate dianion. This structure shows channel-like cavities with dimensions of about 3 Å × 4 Å.
Synthesis and Characterization of an Iron Porphyrin with a Thiolate Axial Ligand and Its Dioxygen Adduct as a Model for the Active Center of Cytochrome P-450
Authors: Tani Fumito , Nakayama Shinya , Ichimura Mari , Nakamura Nobuhumi , Naruta Yoshinori 
Published: September 2003

Abstract
Synthesis and characterization of an iron porphyrin axially-coordinated by thiolate were carried out in order to mimic the active center of cytochrome P-450. O2 binds reversibly to the ferrous form at −80 °C. The oxygenated complex showed a ν(Fe-O2) band at 578 cm−1 in the resonance Raman spectrum.
Synthesis of Cyclic Oligomer Having a Low Ionization Potential
Authors: Maruyama Sumio , Hokari Hirofumi , Tao Xu-tang , Gunji Atsushi , Wada Tatsuo , Sasabe Hiroyuki 
Published: September 2003

Abstract
Synthesis of cyclic oligomer having a low ionization potential (Ip) is described. Ip of this cyclic oligomer was determined as 5.05 eV, which is lowered than that of corresponding poly(3,6-ethynyl-9-tetradecylcarbazole) (5.24 eV). This result indicated that the cyclic oligomer would be new candidate for hole injection and/or transport material in organic light-emitting diodes.
Crystal Structure and Electrochemical Behavior of an Unusual Nitrosyl-Ru Complex Obtained by a Reaction of Ru2(Me COO)4 Cl with 2-Pyridinecarboxylic Acid
Authors: Yukawa Yasuhiko , Igarashi Satoshi , Horiike Hideki , Nagao Hirotaka , Howell F Scott , Mukaida Masao 
Published: September 2003

Abstract
The crystal structure and the electrochemical behavior of a Ru-complex, which was obtained from a reaction of [Ru2(MeCOO)4Cl] with 2-pyridinecarboxylic acid and NO2−, were investigated: the complex consists of nitrosyl, 2-pyridinecarboxylato, and acetato ligands. The cyclic voltammogram showed no redox wave in the region of the potential window, unlike common Ru(NO)-complexes.
Excitation-Polarization Effects on Single-Molecule Fluorescence on Quartz Surfaces
Authors: Yamauchi Masayo , Ye Jing Yong , Yogi Osamu , Ishikawa Mitsuru 
Published: September 2003

Abstract
The single-molecule fluorescence of dye molecules on quartz surfaces was studied by using a photon-counting video microscopy. We observed fluorescent spots including a countable number of molecules. The orientation of the transition dipole of the molecules on quartz surfaces was found to vary widely in contrast to that observed on Si surfaces where the transition dipole was highly ordered.
Production of Polyester Blend of Poly(3-hydroxybutyrate-co-4-hydroxybutyrate) and Poly(3-hydroxyalkanoate) with Saturated and Unsaturated Monomers from 4-Hydroxybutyric Acid by Chromobacterium sp.
Authors: Kimura Hiroshi , Iwama Masanobu , Sasaki Shintaro , Takeishi Makoto 
Published: September 2003

Abstract
Chromobacterium sp. isolated from a river soil produced a polyester blend of poly(3-hydroxybutyrate-co-4-hydroxybutyrate)(P(3HB-co-4HB)) and poly(3-hydroxyalkanoate) (P(3HA)) consisting of both saturated 3-hydroxyalkanoic acid(3HA) units of even carbon number from C4 to C14 and unsaturated 3HA units of carbon number C12 and C14, when 4-hydroxybutyric acid(4HBA) was fed as the sole carbon sources.
Synthesis, Structure and Reactivity of Phenoxo Copper(II) Complexes, Cu(OAr)(HB(3,5-Pri2pz)3) (Ar = C6H4-4-F, 2,6-Me2C6H3, 2,6-But2C6H3)
Authors: Fujisawa Kiyoshi , Iwata Yusaku , Kitajima Nobumasa , Higashimura Hideyuki , Kubota Masaaki , Miyashita Yoshitaro , Yamada Yasunori , Okamoto Ken-ichi , Moro-oka Yoshihiko 
Published: September 2003

Abstract
Structure and reactivity of novel tetrahedral phenoxo copper(II) complexes have been reported as models for the reaction intermediates of tyrosinase catalyzed oxidation of phenols.
Effect of Vapor Adsorption on the Photoelectron Emission from Gold in Ambient Atmosphere
Authors: Inumaru Kei , Okubo Yasuo , Fujii Toshiaki , Yamanaka Shoji 
Published: September 2003

Abstract
Photoelectron emission from Au was measured in ambient atmosphere under irradiation of ultraviolet light from a Hg lamp. The emission was greatly influenced by the adsorption of organic and inorganic vapors. The adsorption of cyclohexene showed a significant, but gradual increase of photoelectron emission. On the other hand, the adsorption of acetone reduced photoelectron emission irreversibly to near zero. The change of the photoelectron emission could be interpreted in terms of the change of the work function.
Electrocatalytic Oxidation of Cysteine on a Nafion-Ruthenium Oxide Pyrochlore Chemically Modified Electrode
Authors: Zen Jyh-Myng , Kumar Annamalai Senthil , Chen Jyh-Cheng 
Published: September 2003

Abstract
The electrocatalytic oxidation of cysteine (CySH) to cystine (CyS-SCy) was noticed on the Nafion-ruthenium oxide pyrochlore chemically modified electrode. The electrocatalytic oxidation was mediated by the RuVI/IV redox sites in the oxide pyrochlore network in terms of the Michaelis-Menten kinetics. The obtained heterogeneous catalytic rate constant (kc) and transfer coefficient (α) are 6.33 s−1 and 0.99, respectively.
8,16,24,32-Tetramethoxy[2.2.2.2]metacyclophane-1,9,17,25-tetrayne: A Novel Ionophore Having a Preorganized but Unexpectedly Flexible Cavity
Authors: Kawase Takeshi , Hosokawa Youichi , Kurata Hiroyuki , Oda Masaji 
Published: September 2003

Abstract
The title cyclophane has a preorganized cavity with about 1.2 Å in diameter surrounded by four oxygen atoms (X-ray analysis); however, solvent extraction experiments using alkali metal picrates revealed the unexpectedly flexible nature of the cavity that forms 1:1 complexes with various alkali metal ions with considerably large association constants.
Preparation of Dialkoxyborylbis(bromozincio)methane and Its Reaction with Electrophiles
Authors: Matsubara Seijiro , Otake Yasuyuki , Hashimoto Yuko , Utimoto Kiitiro 
Published: September 2003

Abstract
Dialkoxyborylbis(bromozincio)methane was prepared from dialkoxyboryldibromomethane by the Pb-catalyzed reaction with zinc. The dialkoxyborylbis(bromozincio)methane afforded vinylboranes by TiCl4-mediated reaction with aldehydes or ketones. The reagent also coupled doubly with an equivalent organic halide under an influence of transition metal salts.
Dibenzoannulated 3,5,3″,5″-Tetra(t-butyl)-p-terphenoquinone. A Reversible, Photochemical-Thermal Switching System Involving Restricted Conformational Change
Authors: Kurata Hiroyuki , Tanaka Tomomi , Oda Masaji 
Published: September 2003

Abstract
The title compound, a new terphenoquinone derivative, shows a dynamic redox behavior upon cyclic voltammetry and a reversible, photochemical-thermal isomerization between the quinone and diradical forms, both phenomena involving restricted conformational change.
Visual Drop Test of Hemoglobin in Whole Blood by Using Ring-like Concentration of Rhodamine B onto Octadecylsilanized Silica Plate
Authors: Kaneko Emiko , Yoshimoto Keitaro , Yotsuyanagi Takao 
Published: September 2003

Abstract
It has been found that some dye solutes become concentrated along the perimeter of an aqueous drop sitting on an octadecylsilanized silica plate. The fluorescent ring of Rhodamine B was applied to a visual test of hemoglobin in whole blood. When a drop of diluted blood and the dye is set on the plate, the resulting fluorescent ring can be observed through the drop with an ultraviolet lamp in the dark only for the samples of low hemoglobin content.
Phase Separation of an Unsymmetrical Disulfide SAM at an Evaporated Au(111) Electrode Monitored by Reductive Desorption and the Electrochemical Response of Cytochrome c
Authors: Nishiyama Katsuhiko , Kie Tan Tjang , Taniguchi Isao 
Published: September 2003

Abstract
The surface structure of an unsymmetrical disulfide (hexadecyl 4-pyridyl disulfide) modified Au(111) evaporated electrode has been evaluated using the redox behavior of cytochrome c and the electrochemical reductive desorption reaction. Controlling the modification time, either a homogeneous SAM or a phase-separated SAM was prepared.
Preparation of Functionalized Unsymmetrical Disulfides by a Base-induced Crossed Reaction of Symmetrical Disulfides
Authors: Kamiyama Hiroaki , Noguchi Toshiya , Onodera Akira , Yokomori Sadakazu , Nakayama Juzo 
Published: September 2003

Abstract
Highly functionalized, unsymmetrical disulfides (presumed metabolites of a bioactive sulfide) were synthesized by a base-induced, crossed reaction of two different symmetrical disulfides. The reaction was also applied to the preparation of a vitamin B1 derivative, Prosultiamine.
Uniform-sized Molecularly Imprinted Polymers for Bisphenol A
Authors: Haginaka Jun , Sanbe Haruyo 
Published: September 2003

Abstract
A uniform-sized molecularly imprinted polymer for bisphenol A (1) has been prepared by a multi-step swelling and thermal polymerization method using 4-vinylpyridine (4-VPY) and ethylene glycol dimethacrylate (EDMA) as a functional monomer and cross-linker, respectively. Hydrophobic and hydrogen bonding interactions between 1 and 4-VPY-EDMA materials could play an important role in the recognition of 1. The 1-imprinted 4-VPY-EDMA materials selectively recognized the template molecule among the phenolic estrogenic and xenoestrogenic compounds tested.
1,2-Carbamoyl Migration on Enantio-enriched α-Lithioalkyl Carbamates Generated with s-Butyllithium/Sparteine: Steric Course and Mechanism
Authors: Tomooka Katsuhiko , Shimizu Hideo , Inoue Tadashi , Shibata Hikaru , Nakai Takeshi 
Published: September 2003

Abstract
Alkyl N,N-diisopropylcarbamates, when lithiated with s-BuLi/(−)-sparteine in ether at −78 °C followed by warming to room temperature, are shown to undergo the 1,2-carbamoyl migration to give the α-hydroxy amides in &gt;95% ee with complete retention of configuration at the Li-bearing carbanion terminus. An addition-elimination mechanism is proposed.
ESR Study on the Nature of Active Site of Silica-supported Chromia in Propane Dehydrogenation Reaction
Authors: Zou Hu , Han Yuwang , Ji Weijie , Shen Jianyi 
Published: September 2003

Abstract
ESR spectroscopy was used to investigate the nature of active site of CrOx/SiO2 in propane dehydrogenation reaction and Cr5+ species was proposed to be the active site for the reaction.
A Rare μ3-η1,η2 Peroxo Bridge between Two CoIIIPbII Dinuclear Units and Hydrolytic Conversion into a Hydroxo-Bridged CoIIIPbII Complex
Authors: Furutachi Hideki , Fujinami Shuhei , Suzuki Masatatsu , Okawa Hisashi 
Published: September 2003

Abstract
A di(μ-phenoxo)CoIIPbII complex is reversibly oxygenated to form a μ3-η1,η2 peroxo dimer that is hydrolytically converted into a hydroxo–bridged CoIIIPbII complex.
Current-Induced Low-Resistive State in Organic Mott Insulator ET-TCNQ
Authors: Kumai Reiji , Tokura Yoshinori 
Published: September 2003

Abstract
A molecular Mott-insulator ET-TCNQ [ET = BEDT-TTF = bis(ethylenedithio)tetrathiafulvalene, TCNQ = 7,7,8,8-tetracyanoquinodimethane] in which carriers are localized due to the electron correlation shows extremely nonlinear electric conduction or undergoes a dielectric breakdown upon application of a high electric-field. It was demonstrated that a current-driven low-resistive state of ET-TCNQ can be stabilized down to 2 K, suggesting that the conduction path generated by the current-injection is metallic in nature.
Terephthaloyl Derivatives as New Gelators; Excellent Gelation Ability and Remarkable Increase of Gel Strength by Adding Polymers
Authors: Hanabusa Kenji , Itoh Atsushi , Kimura Mutsumi , Shirai Hirofusa 
Published: September 2003

Abstract
New gelators based on benzenedicarboxylic acid were synthesized, and their gelation abilities were clarified. N,N′-Terephthaloyl-bis(l-valylaminooctadecane) was especially an excellent gelator to harden a wide variety of organic fluids. The strength of gel markedly increased with addition of commercially available polymers.
Lifetime of M Intermediate in the D96N Mutant of Bacteriorhodopsin Determined by a Photoelectrochemical Method
Authors: Koyama Koichi , Miyasaka Tsutomu , Needleman Richard , Lanyi Janos K 
Published: September 2003

Abstract
The recombinant D96N mutant of bacteriorhodopsin (bR) was immobilized on SnO2 electrode that contacts an aqueous electrolyte. By laser pulse excitation, photocurrent behavior of D96N was analyzed to evaluate the lifetime of the M intermediate involved in proton transfer reactions. The half-life of the M intermediate in the photocycle was about 5 s, which is 103-fold longer than that of wild-type and shows the crucial role of D96 in the uptake of protons.
Silylated Chitin: A New Organosoluble Precursor for Facile Modifications and Film Casting
Authors: Kurita Keisuke , Hirakawa Masaaki , Nishiyama Yasuhiro 
Published: September 2003

Abstract
Trimethylsilylation of chitin and some properties of the product have been examined. Full substitution could be achieved on β-chitin under appropriate conditions. The high solubility along with easy desilylation enabled simple preparation of chitin films. Furthermore, the silylated chitin exhibited high reactivity and thus proved to be a convenient organosoluble precursor for facile modifications of this intractable biomass resource.