Topically applied circulation enhancing agent and skin and hair cosmetic and bath agent containing the same
申请人:Sagawa Koichiro
公开号:US20060287390A1
公开(公告)日:2006-12-21
A topically applied circulation enhancing agent suited for application over the entire body which has good transdermal absorptivity and causes little irritation is provided. A topically applied circulation enhancing agent is provided which contains a fatty acid ester denoted by general formula (1):
Evaluation of the Antioxidant Activity of Capsiate Analogues in Polar, Nonpolar, and Micellar Media
作者:Kunduru K. Reddy、Thumu Ravinder、Rachapudi B. N. Prasad、Sanjit Kanjilal
DOI:10.1021/jf104244m
日期:2011.1.26
Synthesis of 10 capsiate analogues was conducted by lipase-mediated (Novozyme 435) esterification of vanillyl alcohol with different fatty acids. The antioxidant activity of the synthesized capsiates was evaluated using three in vitro assays: DPPH radical scavenging assay (polar medium), Rancimat assay (nonpolar medium), and autoxidation of linoleic acid (micellar medium). The objective of this study is to find the influence of structural characteristics of the alkyl chain of capsiate analogues on their antioxidant activity. In these assays, BHT and alpha-tocopherol were used as reference compounds. Both DPPH and Rancimat assays did not show any specific trend of antioxidant activity with the increase in lipophilicity and also with the type of fatty acids grafted to the phenolic moiety. In the Tween 20 micellar system for the inhibition of autoxidation of linoleic acid, vanillyl ester attached to a C18 alkyl chain (vanillyl stearate, oleate and ricinoleate) exhibited maximum inhibition of autoxidation of linoleic acid.
US9399030B2
申请人:——
公开号:US9399030B2
公开(公告)日:2016-07-26
Enzymatic Synthesis of a Capsinoid by the Acylation of Vanillyl Alcohol with Fatty Acid Derivatives Catalyzed by Lipases
作者:Kenji KOBATA、Manami KAWAGUCHI、Tatsuo WATANABE
DOI:10.1271/bbb.66.319
日期:2002.1
Capsinoids are a novel group of compounds produced by the Capsicum plant. We synthesized a capsinoid by the lipase-catalyzed esterification of vanillyl alcohol with fatty acid derivatives in an organic solvent. The use of seven out of 17 commercially available lipases, especially Novozym 435, was applicable to the synthesis of vanillyl nonanoate, a model compound of capsinoids. The yield of vanillyl nonanoate under the optimum conditions of 50 mM vanillyl alcohol and 50 mM methyl nonanoate in 500 μl of dioxane, using 20 mg of Novozym 435 and 50 mg of 4 Å molecular sieves at 25°C, was 86% in 20 h. Several capsinoid homologues having various acyl chain lengths (C6–C18) were synthesized at 64–86% yields from the corresponding fatty acid methyl ester. The natural capsinoids, capsiate and dihydrocapsiate, were obtained by a 400-fold-scale reaction at these optimum conditions in 60% and 59% isolated yields, respectively.