Conformational analysis of regio-selectively substituted cellulose esters.

نویسندگان
چکیده

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Thermal analysis of cellulose esters prepared from different molecular weight fractions of high α-cellulose pulp

High α-cellulose has been dissolved in two non-degrading solvent systems like dimethyl sulfoxide/paraformaldehyde (DMSO/PF) and N,N-dimethyl acetamide/lithium chloride (DMAc/LiCl) and then fractionated to different molecular weight fractions by regeneration technique. Esters of the different molecular weight fractions of cellulose have been prepared having substitution chain length of C2-C5 usi...

متن کامل

Synthesis of Substituted Oxo-Azepines by Regio- and Diastereoselective Hydroxylation.

Substituted seven-membered N-heterocycles are prevalent bioactive epitopes and useful synthons for preparing enzyme inhibitors or molecular recognition systems. To fully exploit the chemical properties of this flexible N-heterocycle scaffold, efficient methods for its diverse functionalization are required. Here we utilize the late-stage oxidation of tetrahydroazepines as an approach to access ...

متن کامل

Highly regio- and stereoselective nitro-oxoamination of mono-substituted allenes.

A highly regio- and stereoselective (up to 99/1) nitro-oxoamination reaction of mono-substituted allene occurs under mild conditions with readily available AgNO2 and a free radical trap TEMPO to form one C-N bond and one C-O bond in one step. Various functional groups and heterocycles could be tolerated in this conversion.

متن کامل

Regio-controlled ring-opening polymerization of perfluoroalkyl-substituted epoxides.

Highly fluorinated epoxides were polymerized under mild conditions regioregularly, which gave easy access to isotactic polymers by using optically pure epoxides.

متن کامل

Conformational studies on heteroleptic trifluoromethyl-substituted phenylboranes.

Organoboranes carrying electron-withdrawing substituents are commonly used as Lewis acidic catalysts or cocatalysts in a variety of organic processes. These Lewis acids also became popular through their application in `frustrated Lewis pairs', i.e. combinations of Lewis acids and bases that are unable to fully neutralize each other due to steric or electronic effects. We have determined the cry...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: Sen'i Gakkaishi

سال: 1991

ISSN: 0037-9875,1884-2259

DOI: 10.2115/fiber.47.8_379