Preparation and reactivity of persistent and stable silyl-substituted bisketenes

DC Zhao, AD Allen, TT Tidwell

文献索引：Zhao, Da-Chuan; Allen, Annette D.; Tidwell, Thomas T. Journal of the American Chemical Society, 1993 , vol. 115, # 22 p. 10097 - 10103

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被引用次数: 43

摘要

Results Reaction of bis (trimethylsily1) acetylene with dichloroketene generated by dechlorination using a zinocopper coupleba4 gave the dichlorocyclobutenone 9 in 88% yield. Simplified procedures involving activation of zinc by ultrasonicationa or dry heatingbe have appeared, and both have subsequently been of usebf in the preparation of 9. The reaction of 96g, b with concentrated H2SO4 at 55 OC gave 2 in 73% yield after ...