New Cationic Bisoxazoline-Au(III) Complex Catalyzed Cycloisomerization of 1-Allenyl-1-ethynyl Acetate
作者:Keisuke Kato、Hiroyuki Akita、Takuya Kobayashi、Takeo Fujinami、Satoshi Motodate、Taichi Kusakabe、Tomoyuki Mochida
DOI:10.1055/s-2008-1072655
日期:——
Treatment of 1-allenyl-1-diethynyl acetates in the presence of a Au or Pt catalyst (5 mol%) in toluene at room temperature, followed by methanolysis, gave 4-methylene-2-cyclopentenones. The new cationic bisoxazoline (box)-Au(III) complex (S,S)-Phbox- or [(R,R)-Bnbox AuCl2]SbF6} accelerated the reaction, providing the products in moderate yield (60-69%).
室温下,在甲苯中使用金或铂催化剂(5 摩尔%)处理 1-烯基-1-二乙炔基乙酸酯,然后进行甲醇分解,可得到 4-亚甲基-2-环戊烯酮。新的阳离子双噁唑啉(box)-Au(III) 复合物 (S,S)-Phbox- 或 [(R,R)-Bnbox AuCl2]SbF6} 加快了反应速度,以中等产率(60-69%)提供了产物。