Novel generation and cycloaddition reactivity of N-phenylsulfonylbenzonitrilimine via thermal decomposition of N-(phenylsulfonyl)benzohydrazonoyl chloride
作者:Tadashi Sasaki、Shoji Eguchi、Yumo Tanaka
DOI:10.1016/s0040-4020(01)83123-9
日期:1980.1
3-dipolar cycloadducts with ethyl (4a) and methyl acrylate (4b), acrylonitrile (4c), styrene (4d), norbornene (4e), and norbornadiene (4f). The reactions with 4a–d, 2 afforded regiospecifically 5-R substituted pyrazolines 5a–d in lower yields. The raction of 2 with 4e gave only exo adduct 5e, while the reaction with 4f gave both exo- (5fx) and endo adducts (5fn) as well as their retro-Diels-Alder product
的N(苯基磺酰基)-benzohydrazonoyl酰氯(热分解1在回流甲苯生成的N-phenylsulfonylbenzonitrilimine()2这给1,3-偶极cycloadducts用乙酸乙酯()4A)和丙烯酸甲酯(图4b),丙烯腈(图4c),苯乙烯(4d),降冰片烯(4e)和降冰片二烯(4f)。与4a–d,2的反应以较低的产率提供了区域特异性的5-R取代的吡唑啉5a–d。的raction 2与4E只给了外加合物5e,与4f的反应给出了exo-(5f x)和内加合物(5f n)以及他们的Diels-Alder逆向产物6。