Broadening the scope of Baeyer–Villiger monooxygenase activities toward α,β-unsaturated ketones: a promising route to chiral enol-lactones and ene-lactones
作者:T. Reignier、V. de Berardinis、J.-L. Petit、A. Mariage、K. Hamzé、K. Duquesne、V. Alphand
DOI:10.1039/c4cc02541e
日期:——
Three regiodivergent BaeyerâVilliger mono-oxygenases (enantioselectively) oxidized a series of cyclic α,β-unsaturated ketones into (chiral) either enol-lactones or ene-lactones. An easy-to-use and efficient biocatalytic process based on a host-microorganism deprived of unwanted activities (knock-out mutant) was developed to enable the exclusive synthesis of unsaturated lactones.
Asymmetric Baeyer–Villiger oxidation: classical and parallel kinetic resolution of 3-substituted cyclohexanones and desymmetrization of <i>meso</i>-disubstituted cycloketones
Regioselectivity is a crucial issue in Baeyer–Villiger (BV) oxidation. To date, few reports have addressed asymmetric BV oxidation of 3-substituted cycloketones due to the high difficulty of controlling regio- and stereoselectivity. Herein, we report the asymmetric BV oxidation of 3-substituted and meso-disubstituted cycloketones with chiral N,N′-dioxide/Sc(III) catalysts performed in three ways: classical
(METH)ACRYLATE COMPOUND, (METH)ACRYLIC COPOLYMER AND PHOTOSENSITIVE RESIN COMPOSITION CONTAINING SAME
申请人:MITSUBISHI GAS CHEMICAL COMPANY, INC.
公开号:US20160347896A1
公开(公告)日:2016-12-01
The present invention provides a resist or a compound for use as a resist, which is highly sensitive and well-balanced without losing the fundamental physical properties required as a chemically amplified resist (e.g., resolution, line edge roughness (LER)).
The present invention is directed to a (meth)acrylate compound represented by general formula (1) and a process for preparation thereof, as well as a (meth)acrylic copolymer obtainable by polymerization of the (meth)acrylate compound of general formula (1) and a photosensitive resin composition thereof:
(wherein R
1
represents a hydrogen atom or a methyl group, R
2
represents a linear or branched alkyl group containing 2 to 4 carbon atoms, and each R
3
may be the same or different and represents a group represented by the following formula (2) or (3), etc.)
(provided that formulae (2) and (3) are as defined in the specification of the present application).