Mesoionic carbenes: Reactions of 1,3-diphenyltetrazol-5-ylidene with electron-deficient alkenes, and synthesis and catalytic activities of the (tetrazol-5-ylidene)rhodium(I) complexes
作者:Shuki Araki、Keisaku Yokoi、Ryosuke Sato、Tsunehisa Hirashita、Jun-Ichiro Setsune
DOI:10.1002/jhet.61
日期:2009.3
N-phenylmaleimide, and dimethyl acetylenedicarboxylate, did not give any coupling products, but gave phenylated products and/or Michael addition products via the degradation of the 1,3-diphenyltetrazole ring. Novel mesoionic mono- and bis(carbene)-rhodium(I) complexes were synthesized and the structures were characterized by X-ray crystallography. Their catalytic activities for the decarbonylative addition reaction
研究了1,3-二苯基四唑-5-亚烷基(一种中性碳烯的实例)与缺电子的不饱和化合物的反应。卡宾与1,2,4,5-四嗪-3,6-二羧酸二甲酯与肼衍生物一起生成5-四唑甲基化物。与之反应四氰基乙烯以低收率得到另一种亚甲基。相反,与弱亲电试剂的反应,例如3,6-二苯基-1,2,4,5-四嗪,富马腈,ñ苯基马来和乙炔二羧酸二甲酯,不产生任何偶联产物,但通过苯甲酸酯的降解得到苯甲酸酯化产物和/或迈克尔加成产物。1,3-二苯基四唑环。合成了新型的介电单-和双(卡宾)-铑(I)配合物,并通过X射线晶体学对其结构进行了表征。他们对decarbonylative催化活性加成反应的苯甲酰氯,以对乙炔基苯进行了研究。J.杂环化学,(2009)。