Highly regioselective synthesis of novel aromatic esters of arbutin catalyzed by immobilized lipase from Penicillium expansum
摘要:
Ester derivatives of phenolic glycosides have attracted more attention in food, cosmetic and pharmaceutical industries, due to their potent biological activities. In the present study, a group of novel aromatic esters of arbutin were successfully synthesized by using immobilized lipase from Penicillium expansum with excellent 6'-regioselectivities (>99%) and moderate to excellent isolated yields (68-93%), except for 6'-O-vanilloyl-arbutin and 6'-O-(p-hydroxycinnamoyl)-arbutin with 28% and 34% yields, respectively. Among all the acyl donors tested, the lipase was most active towards vinyl 3-phenylpropionate, while remarkable decrease in the activity was recorded when the phenyl of acyl donors carried the hydroxyl and/or methoxyl. (C) 2010 Published by Elsevier B.V.
A vegetative stigmata therapeutic agent contains as an effective ingredient a human umbilical cord extract which is obtained by the steps of subjecting a human umbilical cord to a physically-destructive treatment such as crushing treatment, ultrasonic treament, repetitive freezing and melting treatment and the like, or to a proteolytic decomposing treatment by the use of acids or enzymes, or to both treatments and then extracting the umbilical cord extract from the destroyed and/or decomposed umbilical cord by a solvent.
作者:L. Verotta、F. Orsini、F. Pelizzoni、G. Torri、C. B. Rogers
DOI:10.1021/np9902237
日期:1999.11.1
The phytochemical investigation of members of the genus Protea afforded a series of polyphenolic compounds (1-5) that were identified by 1D and 2D NMR experiments. Of these, 2-5 are new compounds. Chemical syntheses of 1-3 were performed in order to confirm the structures and to prepare additional material for biological evaluation.
Highly regioselective synthesis of novel aromatic esters of arbutin catalyzed by immobilized lipase from Penicillium expansum
作者:Rong-Ling Yang、Ning Li、Min Ye、Min-Hua Zong
DOI:10.1016/j.molcatb.2010.07.003
日期:2010.11
Ester derivatives of phenolic glycosides have attracted more attention in food, cosmetic and pharmaceutical industries, due to their potent biological activities. In the present study, a group of novel aromatic esters of arbutin were successfully synthesized by using immobilized lipase from Penicillium expansum with excellent 6'-regioselectivities (>99%) and moderate to excellent isolated yields (68-93%), except for 6'-O-vanilloyl-arbutin and 6'-O-(p-hydroxycinnamoyl)-arbutin with 28% and 34% yields, respectively. Among all the acyl donors tested, the lipase was most active towards vinyl 3-phenylpropionate, while remarkable decrease in the activity was recorded when the phenyl of acyl donors carried the hydroxyl and/or methoxyl. (C) 2010 Published by Elsevier B.V.