虽然 Sharpless 不对称环氧化/动力学拆分提供了以高选择性获得反构型末端环氧醇的途径,但目前还没有类似的顺选择性环氧化工艺。我们报告说,这种“缺失的环节”是由现成的钛 salalen 催化剂提供的。除了烯丙醇外,烯丙醚在低催化剂负载下以极高的顺式选择性环氧化,使用水性 H 2 O 2作为氧化剂。
Highly diastereo- and enantio-selective epoxidation of secondary allylic alcohols catalyzed by styrene monooxygenase
作者:Hui Lin、Yan Liu、Zhong-Liu Wu
DOI:10.1039/c0cc04360e
日期:——
Enantiomerically enriched glycidol derivatives with contiguous stereogenic centers were obtained in a highly diastereo- and enantio-selective epoxidation catalyzed with the styrene monooxygenase StyAB2.
epoxidation could also achieve the kinetic resolution of racemic secondary allylicalcohols, yielding the corresponding epoxides with up to 50% yields, as well as excellent enantio- and diastereoselectivity (up to >99% ee and >99% de) within 20–60 min, making a greener strategy for the production of valuable enantiopure glycidol derivatives in the fine chemical and pharmaceutical industries.
Synthesis of enantiopure glycidol derivatives via a one-pot two-step enzymatic cascade
作者:Yu-Chang Liu、Yan Liu、Zhong-Liu Wu
DOI:10.1039/c4ob02186j
日期:——
An enzymatic cascade reaction employing anS-specific ketoreductase and a styrene monooxygenase to synthesize enantiopure glycidol derivatives is described.
描述了一种使用特异性酮还原酶和苯乙烯单加氧酶进行酶级级联反应以合成对映纯的环氧乙烷衍生物的方法。
COMPOUNDS, COMPOSITIONS AND METHODS FOR REDUCING TOXICITY AND TREATING OR PREVENTING DISEASES
申请人:Danishefsky Samuel J.
公开号:US20110312904A1
公开(公告)日:2011-12-22
The present invention provides compounds of Formula (I), compositions comprising an effective amount of a compound of Formula (I), optionally with chemotherapeutic drugs such as a tubulin-binding drug, and methods of their use for reducing the toxicity of cytotoxic agents, treating or preventing cancer or a neuropathic disorder, inducing a chemoprotective phase II enzyme, DNA, or protein synthesis, enhancing the immune system, treating inflammation, improving and enhancing general health or well-being, and methods for making compounds of Formula (I).
Erythro alpha-amino epoxide, an important intermediate for synthesis of protease inhibitors, was synthesized from propargylic alcohol in a highly enantio- and diastereoselective manner. (C) 1999 Elsevier Science Ltd. All rights reserved.