A compound represented by the following formula (I′)
wherein X
1
is a methylene group, an ethylene group, a trimethylene group or a vinylene group, X
2
is a divalent group represented by the following formula A or B,
Y is an ethylene group or a vinylene group, m and n are each an integer of 0 to 7, which satisfy m+n=0 to 8, R1 and R2 are each independently a hydrogen atom, a methyl group or an ethyl group, provided that when X
1
is a methylene group, then X
2
is not a divalent group represented by the formula A, and when X
1
is a vinylene group, then X
2
is not a divalent group represented by the formula A. The compound is a stable capsinoid derivative, and is useful as an active ingredient of an external blood circulation enhancer or a cosmetic composition, a pharmaceutical composition, or a food composition.
Various practical methods for the selective C−Hfunctionalization of the ortho and recently also of the meta position of an arene have already been developed. Following our recent development of the directing‐group‐assisted para C−Hfunctionalization of toluene derivatives, we herein report the first remote para C−Hfunctionalization of phenol derivatives by using a recyclable silicon‐containing biphenyl‐based
A compound represented by the following formula (I′)
wherein X1 is a methylene group, an ethylene group, a trimethylene group or a vinylene group, X2 is a divalent group represented by the following formula A or B,
Y is an ethylene group or a vinylene group, m and n are each an integer of 0 to 7, which satisfy m+n=0 to 8, R1 and R2 are each independently a hydrogen atom, a methyl group or an ethyl group, provided that when X1 is a methylene group, then X2 is not a divalent group represented by the formula A, and when X1 is a vinylene group, then X2 is not a divalent group represented by the formula A. The compound is a stable capsinoid derivative, and is useful as an active ingredient of an external blood circulation enhancer or a cosmetic composition, a pharmaceutical composition, or a food composition.
A compound represented by the following formula (I′)
wherein X
1
is a methylene group, an ethylene group, a trimethylene group or a vinylene group, X
2
is a divalent group represented by the following formula A or B,
Y is an ethylene group or a vinylene group, m and n are each an integer of 0 to 7, which satisfy m+n=0 to 8, R1 and R2 are each independently a hydrogen atom, a methyl group or an ethyl group, provided that when X
1
is a methylene group, then X
2
is not a divalent group represented by the formula A, and when X
1
is a vinylene group, then X
2
is not a divalent group represented by the formula A. The compound is a stable capsinoid derivative, and is useful as an active ingredient of an external blood circulation enhancer or a cosmetic composition, a pharmaceutical composition, or a food composition.
Enzymatic synthesis of phenolic acid esters and steryl phenolates
申请人:ETH Zurich
公开号:EP2886657A1
公开(公告)日:2015-06-24
The present invention relates to a method for obtaining at least one steryl phenolate from at least one phenolic acid in an enzymatic process using a lipase, wherein in a first step a) the at least one phenolic acid and at least one alcohol R1-OH undergo an enzymatic esterification to at least one phenolic acid ester according to reaction scheme (III)
, and in at least one second step b) the at least one phenolic acid ester and at least one sterol R2-OH undergo an enzymatic transesterification using a lipase to at least one steryl phenolate according to reaction scheme (IV)