Synthesis of higher α-chlorovinyl and α-bromovinyl amino acids: The amino protecting group determines the reaction course
作者:David B. Berkowitz、Michelle L. Pedersen、Wan-Jin Jahng
DOI:10.1016/0040-4039(96)00832-5
日期:1996.6
α-vinyl amino esters are smoothly converted to the corresponding α-chlorovinyl or α-bromovinylamino esters through the agency of phenyselenyl chloride or phenylselenyl bromide, respectively, followed by oxidation and pyrolysis. Exclusively the (E)-external halovinyl isomer and the internal halovinyl isomer are observed. The aminoprotectinggroup is a critical determinant of the reactioncourse (alkene