The present invention includes methods for preparing resveratrol, resveratrol esters and substituted and unsubstituted stilbenes of the formula given below; where each Y is —O or halogen, each Z is —O or halogen, each n and each m is independently the value of 0, 1, 2, 3, 4 or 5, each A and each B is independently selected from P
n
, R or absent, each V and each W is independently selected from P
n
, straight or branched alkyl of from 2 to 6 carbon atoms and cycloalkyl of from 3 to 8 carbon atoms, alkoxy, phenyl, benzyl or halogen, R is independently selected from the group comprising alkyl with at least one carbon atom, aryl and aralkyl, P
n
is an alcohol protecting group and diastereoisomers of the foregoing. The compounds are made from a multi-step process including a N-heterocyclic carbene-type ligand coupling in the presence of a base with benzyol halide and styrene coupling partners. These compounds show increased stability for use in the food, cosmetic and pharmaceutical industries.
本发明涉及制备
白藜芦醇、
白藜芦醇酯和给出下列式子的取代和未取代的
苯乙烯的方法;其中每个Y是—O或卤素,每个Z是—O或卤素,每个n和每个m是独立地取值为0、1、2、3、4或5,每个A和每个B是独立地从Pn、R或缺失中选择,每个V和每个W是独立地从Pn、2到6个
碳原子的直链或支链烷基和3到8个
碳原子的
环烷基、烷
氧基、
苯基、
苄基或卤素中选择,R是独立地从包括至少一个
碳原子的烷基、芳基和芳基烷基的群体中选择,Pn是醇保护基和上述化合物的对映异构体。这些化合物是通过多步反应制备的,包括在碱存在下与
苯乙烯偶联反应的N-杂环卡宾型
配体偶联反应。这些化合物表现出增强的稳定性,可用于食品、化妆品和制药工业中。