不对称硼氢化是制备对映体富集化合物的重要方法,在许多化学领域都是必需的。本文报道了一种独特的手性氯硼烷-内醚配合物的制备及其在不对称硼氢化中的应用。这种氯硼烷很容易以结晶、无溶剂和对映体纯的形式获得。路易斯碱性甲氧基的化学位移对硼环境敏感,这使得该试剂特别适用于核磁共振研究,其中非对映异构体比例在许多情况下可以在氧化之前确定,甚至动力学也相对容易进行。它很容易与前手性烯烃反应,氧化后产生高达 82% ee 的醇。二烷基氯硼烷中间体可以通过直接重结晶或作为空气稳定的乙醇胺络合物进行非对映体纯化,氧化后得到高达 99.8% ee 的醇。氯基很容易被氢化物取代原位,允许分子内不对称硼氢化和氘硼化,具有分子间硼氢化不能提供的高度区域化学控制。
Preparation of Campholenal Analogues: Chirons for the lipophilic moiety of sandalwood-like odorant alcohols
作者:Christian Chapuis、Robert Brauchli
DOI:10.1002/hlca.19920750507
日期:1992.8.13
In connection with structure-activityrelationship studies, analogues of campholenal ((+)-4b), an important building block for sandalwood-like odorants, were prepared. The five-membered-ring analogues 4 were obtained by epoxidation of the corresponding α-pinene derivatives 2, followed by catalytic ZnBr2 isomerisation (Scheme 2). The six-membered-ring skeleton was obtained by ozonolysis of α-campholenyl
Mok, Pearl L. H.; Roberts, Brian P.; McKetty, Paula T., Journal of the Chemical Society. Perkin transactions II, 1993, # 4, p. 665 - 674
作者:Mok, Pearl L. H.、Roberts, Brian P.、McKetty, Paula T.
DOI:——
日期:——
Allard; Berge, Bulletin de la Societe Chimique de France, 1955, p. 1399,1407
作者:Allard、Berge
DOI:——
日期:——
Correction to “Synthesis and Crystal Structure of an Enantiomerically Pure, Internally Coordinated Alkylchloroborane. The Boron-Centered Anomeric Affect”
作者:Christopher S. Shiner、Charles M. Garner、R. Curtis Haltiwanger
DOI:10.1021/jacs.8b04936
日期:2018.6.20
PERFUME SYSTEMS
申请人:Denutte Hugo Robert Germain
公开号:US20120329696A1
公开(公告)日:2012-12-27
The present application relates to perfume raw materials, perfume delivery systems and consumer products comprising such perfume raw materials and/or such perfume delivery systems, as well as processes for making and using such perfume raw materials, perfume delivery systems and consumer products. Such perfume raw materials and compositions, including the delivery systems, disclosed herein expand the perfume communities' options as such perfume raw materials can provide variations on character and such compositions can provide desired odor profiles.