A Facile One-Pot Conversion of Acetates of the Baylis−Hillman Adducts to [<i>E</i>]-α-Methylcinnamic Acids
作者:Deevi Basavaiah、Marimganti Krishnamacharyulu、Rachakonda Suguna Hyma、Pakala K. S. Sarma、Nagaswamy Kumaragurubaran
DOI:10.1021/jo981761b
日期:1999.2.1
A simple and convenient stereoselective synthesis of [E]-alpha-methylcinnamic acids via the nucleophilic addition of hydride ion from sodium borohydride to methyl 3-acetoxy-3-aryl-2-methylenepropanoates followed by hydrolysis and crystallization is described. Efficacy of this methodology in the synthesis of [E]-p-(myristyloxy)-alpha-methylcinnamic acid, an active hypolipidemic agent, and [E]-p-(carbomethoxy)-alpha-methylcinnamic acid, a valuable synthon for an orally active serine protease inhibitor, is also demonstrated.