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.
Volatile Lactones — (5S,S)-5-Methyl-3-(methylalkyl)furan-2(5H)-ones — Identified in the Submerged Cultivation ofStreptomyces Avermitilis
作者:Tomáš Řezanka、Karel Sigler
DOI:10.1002/ejoc.200600343
日期:2006.9
Six new compounds have been identified in the volatile fractions produced during the submergedcultivation of Streptomyces avermitilis. By recording the GC/MS, GC/FTIR, CD, 1H and 13C NMR data and by performing chemical degradation experiments, these compounds were determined to be (5S,S)-5-methyl-3-(methylalkyl)furan-2(5H)-ones. Herein, the existence of volatilelactones with an anteiso structure of
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.