chloride-aluminium chloride complexes, XC6H4 COCl·AlCl3 in methylene chloride at 0–20° to form the corresponding ketones XC6H4CO(CC)nSiMe3 in excellent (n = 1) or moderate (n = 2, 4) yield. Treatment of the products with aqueous methanolic borax results in virtually quantitative liberation of the terminal alkynyl ketones XC6H4CO(CC)nH. The method provides the first practical route to the ketotetraynes (n = 4) and
双(三甲基甲
硅烷基)
乙炔Me 3 Si(CC)n SiMe 3与酰
氯-
氯化铝络合物XC 6 H 4 COCl·AlCl 3在
二氯甲烷中于0-20°反应形成相应的酮XC 6 H 4 CO(CC)n SiMe 3具有极好(n = 1)或中等(n = 2,4)的产率。用含
水甲醇硼砂处理产品实际上可定量释放末端炔基酮XC 6 H 4 CO(CC)nH.该方法提供了通向酮四炔的第一种实用途径(n= 4),并有用地补充了现有的用于酮-单炔和-二炔合成的氧化方法。与我
草酰氯氯化-铝复合发生反应3 SiCCSiMe 3,得到新的甲
硅烷基取代的杂环(I):