通过使用手性铁络合物作为催化剂,使用N-保护的氨基酸(AAs)作为大分子配体,描述了使用水为H 2 O 2的α-取代的苯乙烯的高度对映选择性环氧化。氨基酸与铁中心协同作用,以促进H 2 O 2的有效活化,从而在较短的反应时间内以良好的收率和立体选择性(高达97%ee)催化这种具有挑战性的底物的环氧化 。
通过使用手性铁络合物作为催化剂,使用N-保护的氨基酸(AAs)作为大分子配体,描述了使用水为H 2 O 2的α-取代的苯乙烯的高度对映选择性环氧化。氨基酸与铁中心协同作用,以促进H 2 O 2的有效活化,从而在较短的反应时间内以良好的收率和立体选择性(高达97%ee)催化这种具有挑战性的底物的环氧化 。
ENANTIOPURE BASE-METAL CATALYSTS FOR ASYMMETRIC CATALYSIS AND BIS(IMINO)PYRIDINE IRON ALKYL COMPLEXES FOR CATALYSIS
申请人:CHIRIK Paul J.
公开号:US20130079567A1
公开(公告)日:2013-03-28
Disclosed herein are iron, nickel, or cobalt compounds having tridentate ligands, which can have at least one chiral moiety in the molecular structure thereof and the use of these compounds for the hydrogenation and transformation of olefins (preferably prochiral) and alkynes.
Asymmetric Epoxidation of 1,1-Disubstituted Terminal Olefins by Chiral Dioxirane via a Planar-like Transition State
作者:Bin Wang、O. Andrea Wong、Mei-Xin Zhao、Yian Shi
DOI:10.1021/jo801576k
日期:2008.12.19
Various 1,1-disubstituted terminalolefins have been investigated for asymmetric epoxidation using chiral ketone catalysts. Up to 88% ee has been achieved with a lactam ketone, and a planar transition state is likely to be a major reaction pathway.
CETP INHIBITORS DERIVED FROM BENZOXAZOLE ARYLAMIDES
申请人:Hunt Julianne A.
公开号:US20100197630A1
公开(公告)日:2010-08-05
Compounds having the structure of Formula I, including pharmaceutically acceptable salts of the compounds, are potent CETP inhibitors, and are useful for raising HDL-cholesterol, reducing LDL-cholesterol, and for treating or preventing atherosclerosis. In formula I, A-B is an arylamide moiety.
Iridium-Catalyzed Asymmetric Transfer Hydrogenation of 1-Aryl-1-alkylethenes with Ethanol
作者:Xixia Tang、Lu Qian、Guixia Liu、Zheng Huang
DOI:10.1021/acs.orglett.3c01880
日期:2023.7.7
Asymmetric transfer hydrogenation of 1-aryl-1-alkylethenes with ethanol was developed with a chiral (PCN)Ir complex as the precatalyst, featuring high enantioselectivities, good functional group tolerance, and operational simplicity. The method is further applied to formal intramolecular asymmetric transfer hydrogenation of alkenols without an external H-donor, producing a tertiary stereocenter and
以手性(PCN)Ir配合物为预催化剂,开发了1-芳基-1-烷基乙烯与乙醇的不对称转移氢化反应,具有对映选择性高、官能团耐受性好、操作简单等特点。该方法进一步应用于无需外部氢供体的烯醇的正式分子内不对称转移氢化,同时产生叔立构中心和远程酮基。克级合成和( R )-黄根醇关键前体的合成凸显了催化系统的实用性。
Verfahren zur Herstellung von substituierten Styrolen
申请人:BAYER AG
公开号:EP0197274A1
公开(公告)日:1986-10-15
Substituierte Styrole werden hergestellt durch Behandlung von N-Acyl-ß-phenethylaminen mit Basen und Abdestillieren des während der Reaktion gebildeten Styrols.