Thioiminoethers and thioiminocarbonates of α-amino acid esters undergo acetic acid catalysed cycloaddition reaction with N-phenylmaleimide via their 1,3-dipolar tautomers.
作者:M. S. Marthas、S. G. Amin、H. P. S. Chawk、Ajay K. Bose
DOI:10.1002/jhet.5570150415
日期:1978.6
A convenient synthesis of α-hydroxy-β-lactams has been devised that involves the annelation of an inline with benzyloxyacetyl chloride and triethylamine and subsequent hydrogenolysis in the presence of palladium on carbon. In most cases a cis-β-lactam was obtained. A thioimidate can also be used as the imino component in the annelation reaction but the hydrogenolysis step fails. The annelation of the