Copper(II) in organic synthesis. IV Reaction of the copper(II) acetate complex of isatin-3-arylhydrazones with dimethyl acety-lenedicarboxylate.
作者:A. Corsico Coda、G. Desimoni、M. Pappalardo、P.P. Righetti、P.F. Seneci、G. Tacconi、R. Obberti
DOI:10.1016/s0040-4020(01)96650-5
日期:1985.1
Cu++ oxidation of the ligand and a [2+2] cycloaddition. The former reaction gave 3-car- benindolin-2-one (13) which reacted with DMAD in a l,3-dipolar cycloaddition, to give 3a. This was synthesized by an independent route. The phenyl radical, generated in the same process, was trapped by three DMAD and gave . The [2+2] cycloaddition gave a spiro adduct 10 which, by electrocyclic ring opening and intramolecular
Isatin-3-phenylhy-drazone(2a)的乙酸铜(II)络合物通过两个竞争途径与乙酰二羧酸二甲酯(DMAD)反应:配体的Cu ++氧化和[2 + 2]环加成。前一个反应得到3-car-苯吲哚-2-酮(13),其与DMAD在a1,3-偶极环加成中反应,得到3a。这是通过独立的途径合成的。在同一过程中生成的苯基自由基被三个DMAD捕获并给出。[2 + 2]环加成产生螺环加合物10,该螺环加合物10通过电环开环和分子内环化作用,可以分离哒嗪并[3,4-b]吲哚(| 5a)。反应在X射线分析证实了-氯苯甲基hydr1b和5b的结构。尝试根据反应物的MO相互作用来合理化反应性。