Synthesis of Some New Unsymmetrically Substituted 1,4-Dihydropyridines
作者:Hamid R. Memarian、Masumeh Abdoli-Senejani、Dietrich Döpp
DOI:10.1515/znb-2006-0110
日期:2006.1.1
5-unsymmetrically substituted1,4-dihydropyridines have been synthesized, which have ethoxycarbonyl and acetyl groups on 3- and 5-positions, respectively. A three-step procedure has been examined to increase the yield of the desired products, by suppressing the formation of the symmetrically substituted 3,5-diacetyl-1,4-dihydropyridines and 3,5-diethoxycarbonyl- 1,4-dihydropyridines.
Agent for stabilizing keratin fibers with 5-ring heterocycles
申请人:Henkel AG & Co. KGaA
公开号:US10561594B2
公开(公告)日:2020-02-18
The subject matter of the present disclosure are agents for stabilizing keratin fibers, more particularly human hair, containing in a cosmetic carrier:
(a) at least one compound of the formula (I)
wherein
X denotes oxygen (—O—), sulfur (—S—) or a grouping —NR5—.
本公开的主题是用于稳定含有化妆品载体的角蛋白纤维(尤其是人类头发)的制剂:
(a) 至少一种式(I)化合物
在其中
X 表示氧 (-O-)、硫 (-S-) 或基团 -NR5-。