Thienamycin total synthesis. 2. Model studies-synthesis of a simple 2-(alkylthio)carbapen-2-em
作者:Susan M. Schmitt、David B. R. Johnston、B. G. Christensen
DOI:10.1021/jo01294a043
日期:1980.3
DIALKYL MESOXALATES BY OZONOLYSIS OF DIALKYL BENZALMALONATES: DIMETHYL MESOXALATE
作者:Tietze, Lutz F.、Bratz, Matthias
DOI:10.15227/orgsyn.071.0214
日期:——
A Lewis acid-promoted cyclization of ethenetricarboxylate derivative aromatic compounds. Novel syntheses of oxindoles and benzofuranones via Friedel–Crafts intramolecular Michael addition
A novel cyclization reaction of ethenetricarboxylate derivative aromatic compounds in the presence of various Lewis acids gave benzo-annulated cyclic compounds such as oxindole and benzofuran derivatives via Friedel-Craftsintramolecular Michael addition in high yields. For example, the reaction of diethyl 2-[(N-methyl-N-phenylcarbamoyl)methylene]malonate (1a) in the presence of ZnCl2 at room temperature