TRIMETHYLSILYL TRIFLATE-CATALYZED REACTION OF BIS(METHYLTHIOMETHYL)AMINES WITH DIKETENE SILYL ACETALS. NOVEL CYCLIZATION LEADING TO FIVE- TO SEVEN-MEMBERED ALICYCLIC AMINES
The reaction of the (bis)trimethylsilyloxy derivative of diethyl succinate with imines in the presence of ZnCl2 provides a general stereoselective entry to beta-carboethoxy-gamma-lactams. (C) 2007 Elsevier Ltd. All rights reserved.