Difluorocarbene Chemistry: A Simple Transformation of 3,3-gem-Difluorocyclopropenes to Cyclopropenones

• 来源期刊: 中国化学（英文版）
• 年，卷（期）: 2006,（9）
• 页码范围: 1219-1224
• 页数: 6页
• 语种: 英文

摘要

The cycloaddition reactions of α-acetyoxyl propynes with difluorocarbene, generated from the decomposition of FSO2CF2CO2SiMe3 in DG in the presence of 10% of NaF at 120 ℃ gave readily α-acetyoxyl gem-difluorocyclopropenes. When these fluorinated compounds were hydrolyzed under alkaline condition at 0 ℃, α-hydroxyl cyclopropenones were produced predominantly whereas treated with catalytic amounts of BF3·Et2O in Et2O, α-acetyoxyl cyclopropenones were obtained.