Unusual reductive cleavage of 3-aryl-2,3-epoxyamides by using samarium diiodide. Synthesis of 3-aryl-3-deuterio-2-hydroxyamides with total regioselectivity
作者:José M. Concellón、Eva Bardales、Cecilia Gómez
DOI:10.1016/s0040-4039(03)01201-2
日期:2003.7.7
Ring-opening of 3-aryl-2,3-epoxyamides 1 was achieved by using samarium diiodide and D2O, yielding 3-aryl-3-deuterio-2-hydroxyamides 2 with total regioselectivity. The starting compounds 1 were easily prepared by reaction of the corresponding lithium or potassium enolates of α-chloroamides with aldehydes or ketones. When the reaction was carried out in the presence of H2O instead of D2O, the corresponding
Reaction of <i>tert</i>-Butyl Dibromoacetate or <i>N</i>,<i>N</i>-Diethyldibromoacetamide with Trialkylmanganate Providing an Alkylated Manganese Enolate
作者:Rie Inoue、Hiroshi Shinokubo、Koichiro Oshima
DOI:10.1021/jo971964k
日期:1998.2.1
Synthesis of Aromatic (<i>E</i>)- or (<i>Z</i>)-α,β-Unsaturated Amides with Total or Very High Selectivity from α,β-Epoxyamides and Samarium Diiodide
作者:José M. Concellón、Eva Bardales
DOI:10.1021/jo0349577
日期:2003.11.1
stereoselective synthesis of aromatic alpha,beta-unsaturated amides was achieved by treatment of aromatic alpha,beta-epoxyamides with samariumdiiodide. The starting compounds 1 and 3 are easily prepared by the reaction of enolates derived from alpha-chloroamides with carbonylcompounds at -78 degrees C. A mechanism to explain this transformation is proposed.