situ from Ti(O-i-Pr)(4), Me(3)SiCl and Mg powder in tetrahydrofuran reacted with epoxides to selectively provide less hindered alcohols via a homolytic ring-opening of epoxides, in which the intermediate beta-titanoxy radical intramolecularly abstracted a hydrogen atom from an alkoxy moiety in the titanium complexes.
申请人:SHIN-ETSU CHEMICAL CO., LTD. 신에쓰 가가꾸 고교 가부시끼가이샤(519980708960)
公开号:KR101723710B1
公开(公告)日:2017-04-05
[해결수단] 화학식 (1)로 표시되는 단량체. (R은 수소 원자, 메틸기 또는 트리플루오로메틸기를 나타낸다. R, R은 1가의 탄화수소기, R∼R는 수소 원자 또는 1가의 탄화수소기를 나타낸다. R은 1가의 탄화수소기 또는 불소화 탄화수소기, A은 2가의 탄화수소기, k은 0 또는 1의 정수, n는 0∼2의 정수) [효과] 본 발명의 단량체로부터 얻어지는 반복 단위를 포함하는 고분자 화합물을 포함하는 포토레지스트막은, 유기 용제 현상에 있어서의 포지티브 네거티브 반전의 화상 형성에 있어서, 미노광 부분의 용해성이 높다.
Asymmetric hydrogenation of beta- or gamma-ketoesters and beta- or
申请人:Merck & Co., Inc.
公开号:US05508435A1
公开(公告)日:1996-04-16
.beta.- or .gamma.-Ketoesters and .beta.- or .gamma.-ketoamides are asymmetrically reduced with a Ru(II)-BINAP derived catalyst at about 40.degree. C. and about 50N/mm.sup.2 of hydrogen in the presence of a strong acid.
Method for producing optically active 2-hydroxycycloalkanecarboxylic acid ester
申请人:SUMITOMO CHEMICAL COMPANY, LIMITED
公开号:US20030186400A1
公开(公告)日:2003-10-02
There is disclosed a method for producing optically active 2-hydroxycycloalkanecarboxylic acid characterized by the steps of: allowing 2-oxocycloalkanecarboxylic acid ester to react with a transformant or a dead cell artificially provided with an ability to asymmetrically reduce 2-oxocycloalkanecarboxylic acid ester to optically active 2-hydroxycycloalkanecarboxylic acid ester and an ability to regenerate a coenzyme on which an enzyme having the former ability depends; and collecting the produced optically active 2-hydroxycycloalkanecarboxylic acid ester.