ASYMMETRIC INDUCTION IN THE [2,3] SIGMATROPIC REARRANGEMENT VIA SULFUR YLIDES DERIVED FROM CHIRAL KETENIMINES
作者:Kunio Hiroi、Shuko Sato
DOI:10.1246/cl.1982.1871
日期:1982.11.5
The asymmetric [2,3] sigmatropic rearrangement of 2-alkylamino-3-phenyl-2-pentenylmethylsulfonium methylide (4) was accomplished by reaction of ethylphenylketenimines 2, having chiral carbons next to the nitrogen atoms, with trimethylsulfonium ylide (3) and acidic hydrolysis of the imines 5 obtained led to optically active 3-methylthiomethyl-3-phenyl-2-pentanone (6). The reaction of ethylphenylketene