The use of β-lactams in the synthesis of spermine and spermidine alkaloids
作者:Harry H. Wasserman、Gregory D. Berger
DOI:10.1016/s0040-4020(01)92138-6
日期:1983.1
The optically active plant product homaline (6) has been synthesized in a convergent sequence starting with β-phenyl-β-alanine and putrescine (14) The key transformation in this sequence is the ring expansion by transamidation of a functionalized chiral β-lactam precursor