[EN] PROCESSES FOR HIGHLY ENANTIO-AND DIASTEREOSELECTIVE SYNTHESIS OF ACYCLIC EPOXY ALCOHOLS AND ALLYLIC EPOXY ALCOHOLS [FR] PROCEDES DE SYNTHESE HAUTEMENT ENANTIOSELECTIVE ET DIASTEREOSELECTIVE D'EPOXYALCOOLS ACYCLIQUES ET D'EPOXYALCOOLS ALLYLIQUES
Highly Enantio- and Diastereoselective One-Pot Synthesis of Acyclic Epoxy Alcohols with Three Contiguous Stereocenters
作者:Alice E. Lurain、Aaron Maestri、Ann Rowley Kelly、Patrick J. Carroll、Patrick J. Walsh
DOI:10.1021/ja046750g
日期:2004.10.1
Two highly enantio- and diastereoselective one-pot procedures for the synthesis of epoxy alcohols with up to three contiguous stereocenters are reported. Route one involves asymmetricaddition of an alkylzinc reagent to an enal followed by diastereoselective epoxidation. Route two entails asymmetric vinylation of an aldehyde with divinylzinc reagents and subsequent diastereoselective epoxidation. The
Highly Enantio- and Diastereoselective One-Pot Synthesis of Acyclic Epoxy Alcohols and Allylic Epoxy Alcohols
作者:Ann Rowley Kelly、Alice E. Lurain、Patrick J. Walsh
DOI:10.1021/ja051291k
日期:2005.10.1
report, we outline a highly enantio- and diastereoselective one-pot method for the efficient synthesis of synthetically useful acyclic epoxy alcohols and allylic epoxy alcohols. Our method takes advantage of a highly enantioselective C-C bond-forming reaction to set the initial chirality. The resulting allyliczinc alkoxide intermediate is then epoxidized in situ using either dioxygen or TBHP in the
在本报告中,我们概述了一种高度对映和非对映选择性的一锅法,用于有效合成合成有用的无环环氧醇和烯丙基环氧醇。我们的方法利用高度对映选择性的 CC 键形成反应来设置初始手性。然后在四烷氧基钛的存在下使用双氧或TBHP将所得烯丙基烷氧基锌中间体原位环氧化。具有多达三个连续立体中心的环氧醇在一锅中形成,具有出色的对映选择性和非对映选择性。在锌醇盐中间体包含两种不同的烯丙基烯烃的情况下,更富电子的双键被化学选择性环氧化以提供烯丙基环氧醇。这种方法代表了一种高效、立体选择性、
Processes for Highly Enantio- and Diastereoselective Synthesis of Acyclic Epoxy Alcohols and Allylic Epoxy Alcohols
申请人:Walsh Patrick
公开号:US20090163728A1
公开(公告)日:2009-06-25
The inventive subject matter relates to novel processes for making an epoxy alcohol from an aldehyde, comprising the steps of: (a) adding (i) an organozinc compound or (ii) divinylzinc compound and an diorganozinc compound to said aldehyde in the presence of a first catalyst to form an allylic alkoxide compound; and (b) epoxidizing said allylic alkoxide compound in the presence of an oxidant and a second catalyst.