Unsaturation of ketones, nitriles and lactams with methyl phenylsulfinate
作者:James E. Resek、A.I. Meyers
DOI:10.1016/0040-4039(95)01461-p
日期:1995.9
An improvedsynthesis of methyl phenylsulfinate 2 by treatment of diphenyl disulfide with bromine in the presence of methanol has been developed. Use of this reagent in the preparation of α,β-unsaturated ketones, nitriles and lactams is described.
Intramolecular Ene Reaction of a Chiral Bicyclic Lactam
作者:James E. Resek
DOI:10.1021/jo801696r
日期:2008.12.19
The preparation of bicylic lactam 2 is described, employing an acetoacetate-based synthesis of 1,4-ketoacid 3. The lactam 2 was shown to undergo a thermal enereaction at 280-300 degrees C to afford tricycle 7. Reduction of the ene product followed by removal of the chiral auxiliary fragment provided the unusual lactam system 9 in highly enantioenriched form.