The regio- and stereo-selectivities in the [2 + 2] photocycloaddition of a series of 1-benzoylindoles with vinyl acetate and methyl acrylate have been investigated. With some exceptions, the 1 -benzoylindoles gave exclusively or predominantly the corresponding 1-acetoxy-3-benzoyl and 3-benzoyl-1-methoxycarbonyl-1,2,2a,7b-tetrahydro-3H-cyclobut[b]indoles as mixtures of stereoisomers.
研究了一系列的1-苯甲酰基吲哚与乙酸乙烯酯和丙烯酸甲酯的[2 + 2]光环加成反应中的区域和立体选择性。除某些例外,1-苯甲酰基吲哚仅或主要以混合物形式提供相应的1-乙酰氧基-3-苯甲酰基和3-苯甲酰基-1-甲氧基羰基-1,2,2a,7b-四氢-3 H-环丁[ b ]吲哚立体异构体。
IKEDA, MASAZUMI;OHNO, KAZUNORI;MOHRI, SHIN-ICHIRO;TAKAHASHI, MASAMI;TAMUR+, J. CHEM. SOC. PERKIN TRANS., 1984, N 3, 405-412