Asymmetric Synthesis of Benzylic Quaternary Carbon Center via an Enzymatic Reaction
作者:Shunsaku Shiotani、Hirohiko Okada、Kumiko Nakamata、Takako Yamamoto、Fumie Sekino
DOI:10.3987/com-96-7421
日期:——
(R)-(+)-((R)-(+)-12) and (S)-(-)-1-formyl-1-methyl-7-methoxy-1,2,3,4-tetrahydronaphthalene ((S)-(-)-12) were synthesized based on enantioselective PLE hydrolysis of diethyl 2-(m-methoxyphenyl)-2-methylmalonate. From (R)-(+)-12, (+)-O-Methylaphanorphine (16) and (-)-aphanorphine were synthesized. (S)-(+)-1-(N-Acetyl-N-methylaminoethyl)-1-methyl-7-methoxytetralin (25) was synthesized from (S)-(-)-12. This transformation constitutes a formal synthesis of (-)-eptazocine.