[EN] INTERMEDIATES FOR THE PREPARATION OF BETA-SANTALOL<br/>[FR] INTERMÉDIAIRES DANS LA PRÉPARATION DU BÉTA-SANTALOL
申请人:FIRMENICH & CIE
公开号:WO2012110375A1
公开(公告)日:2012-08-23
The present invention concerns a process tor the preparation of a compound of formula (I) in the form of any one of its stereoisomers or mixtures thereof, and wherein the dotted line may represents an additional bond and Ra represents a hydrogen atom or a Si(Rb)3 or (Rb)2COH group, each Rb representing C1-6 alkyl group or a phenyl group. The invention concerns also the compound (I) as well as its use for the synthesis of β-santalol or of derivatives thereof.
INTERMEDIATES FOR THE PREPARATION OF BETA-SANTALOL
申请人:Chapuis Christian
公开号:US20130310609A1
公开(公告)日:2013-11-21
The present invention concerns a process for the preparation of a compound of formula (I) in the form of any one of its stereoisomers or mixtures thereof, and wherein the dotted line may represents an additional bond and R
a
represents a hydrogen atom or a Si(R
b
)
3
or (R
b
)
2
COH group, each R
b
representing C
1-6
alkyl group or a phenyl group. The invention concerns also the compound (I) as well as its use for the synthesis of β-santalol or of derivatives thereof.
本发明涉及一种制备式(I)化合物的过程,其形式可以是其任一立体异构体或它们的混合物,其中虚线可能表示额外的键,R
a
表示氢原子或Si(R
b
)
3
或(R
b
)
2
COH基团,每个R
b
代表C
1-6
烷基或苯基。该发明还涉及化合物(I)以及其用于合成β-香檀醇或其衍生物的用途。
US4197411A
申请人:——
公开号:US4197411A
公开(公告)日:1980-04-08
US8822733B2
申请人:——
公开号:US8822733B2
公开(公告)日:2014-09-02
<i>endo</i>/<i>exo</i>Stereoselectivity in<i>Diels</i><i>Alder</i>Reactions of<i>α</i>,<i>β</i>-Dialkylated Conjugated Enals to Cyclic 1,3-Dienes: Intermediates in the Synthesis of (−)-<i>β</i>-Santalol and Its Analogs
作者:Christian Chapuis、David Skuy、Jean-Yves de Saint Laumer、Robert Brauchli
DOI:10.1002/cbdv.201400060
日期:2014.10
to α,β-dialkyl conjugated enals 5 are compared with the analogous endo-favored Diels-Alder reaction of cyclohexa-1,3-diene 7. The exo-stereoselectivity is lower in the homologous case of methylcyclopenta-1,3-diene 9. This diastereoselectivity is discussed either in terms of a retro-homo-Diels-Alder reaction, associated with thermodynamic control, or with respect to either a competing hetero-Diels-Alder/Claisen