First Synthesis of 2-Vinylindole and itsdiels-Alder Reactions with CC-Dienophiles
作者:Ulf Pindur、Manfred Eitel
DOI:10.1002/hlca.19880710517
日期:1988.8.10
of an intramolecular Wittig process, 2-vinylindole (2) was prepared. The indole 2 functions as a heterocyclic, donor-activated 1,3-diene and undergoes [4+2] cycloaddition reactions with dimethyl acetylenedicarboxylate, N-phenylmaleimide, and p-benzoquinone leading to the novel carbazole dervatives 3, 4, 5c, 6 and 7 respectively. The reaction of 2 with acceptor (A)-Substituted dienophiles (e.g.) ACHCH2
通过分子内Wittig法,制备了2-乙烯基吲哚(2)。的吲哚2个用作杂环,供体-活化的1,3-二烯并经历[4 + 2]与乙炔二,环加成反应Ñ苯基马来和p醌导致新颖咔唑的衍生物3,4,5℃,6和7。的反应2与受体(A) -取代的亲双烯体(例如)ACHCH 2,AC≡(CH)不会产生可被分离的产品。