Direct Conversion of Carbonyl Compounds into Organic Halides: Indium(III) Hydroxide-Catalyzed Deoxygenative Halogenation Using Chlorodimethylsilane
作者:Yoshiyuki Onishi、Daigo Ogawa、Makoto Yasuda、Akio Baba
DOI:10.1021/ja0283246
日期:2002.11.1
the corresponding deoxygenative chlorination products, in which the carbonyl carbon accepted two nucleophiles (H and Cl) with releasing oxygen. Only In(OH)3 catalyzed the reaction, and typical Lewis acids such as TiCl4, AlCl3, and BF3.OEt2 showed no catalytic activity. The reaction mechanism of this deoxygenative chlorination includes initial hydrosilylation followed by chlorination. Other nucleophiles
羰基化合物和氯二甲基硅烷的反应在氢氧化铟 (III) 的有效催化下得到相应的脱氧氯化产物,其中羰基碳接受两种亲核试剂(H 和 Cl)并释放氧。只有 In(OH)3 催化了反应,典型的路易斯酸如 TiCl4、AlCl3 和 BF3.OEt2 没有表现出催化活性。这种脱氧氯化的反应机理包括先氢化硅烷化,然后是氯化。其他亲核试剂如烯丙基或碘可用于该方法。铟催化剂的适度路易斯酸度使化学选择性反应成为可能,因此在反应过程中酯、硝基、氰基或卤素基团不受影响。