Stereoselective Synthesis of (<i>Z</i>)-1-Benzhydryl-4-cinnamylpiperazines via the Wittig Reaction
作者:S. Shivprakash、G. Chandrasekara Reddy
DOI:10.1080/00397911.2013.826808
日期:2014.3.4
of producing (E)- and (Z)-isomers of 1-benzhydryl-4-cinnamylpiperazines in a specific ratio from corresponding benzhydrylpiperazine is described. Of the three compounds synthesized (5a–c), the ratio of E/Z-isomers remained around 15:85. The key intermediates, 1-benzhydryl-4-(2,2-dimethoxyethyl)piperazine derivatives (3a–c), were prepared by nucleophilic substitution reaction of benzhydrylpiperazines