Configurational Stability of Oxymethyllithiums as Intermediates in Intramolecular Rearrangements
作者:Dagmar C. Kapeller、Lothar Brecker、Friedrich Hammerschmidt
DOI:10.1002/chem.200701054
日期:2007.11.26
were tested for their microscopic configurational stability in intramolecular isomerizations, such as the silyl- and germyl-[1,2]-retro-Brook and the sigmatropic[2,3]-Wittig rearrangement. The influence of temperature, solvent, and migrating group on the stability of the intermediate carbanions was studied. Furthermore, the stereochemical course of these rearrangements was elucidated, resulting in highly
Alpha-Silyl Alcohols Possessing Olfactory Properties Reminiscent Of Patchouli Oil
申请人:Kraft Philip
公开号:US20120040879A1
公开(公告)日:2012-02-16
The present disclosure refers to sila-substituted carbinols of formula (I)
wherein R
1
, R
2
and R
3
are independently selected from C
1
-C
4
alkyl or C
3
-C
4
cycloalkyl; R
4
is methyl or ethyl; and R
5
is methyl or ethyl. The disclosure further refers to their preparation and to perfume compositions and fragrance applications comprising them.