Synthesis of Cyclic Amino Acid Baikiain Via Asymmetric Phase Transfer Catalysis
作者:José C. Espinoza‐Hicks、David Chávez‐Flores、Gerardo Zaragoza Galán、Alejandro A. Camacho‐Dávila
DOI:10.1002/jhet.4648
日期:——
The synthesis of the cyclic, naturally occurring amino acid baikiain from glycine and cis-1,4-butenediol is reported. The key step of the synthesis is an enantioselective phase transfer catalyzed allylation of the benzophenone imine of glycine t-butyl ester, catalyzed by a cinchonidine quaternary ammonium salt, which provided the allylated glycine in 82% yield and 80% e.e. Further deprotection and