Synthesis of 2,3,4,11b-Tetrahydro-1H-pyridazino[6,1-a]isoquinolines via the Three-Component Reaction of 2-Alkynylbenzaldehydes, a Sulfonohydrazide and Dimethyl Cyclopropane-1,1-dicarboxylate
作者:Jianping Liu、Jie Wu、Xingxin Yu、Guanyinsheng Qiu
DOI:10.1055/s-0030-1260063
日期:2011.7
A three-component reaction of 2-alkynylbenzaldehydes, a sulfonohydrazide and dimethyl cyclopropane-1,1-dicarboxylate, co-catalyzed by silver(I) triflate and nickel(II) perchlorate hexahydrate, is described, which affords 2,3,4,11b-tetrahydro-1H-pyridazino[6,1-a]isoquinolines in moderate to good yields. A possible reaction pathway that proceeds via a tandem 6-endo-cyclization and [3+3] cycloaddition sequence is proposed.
描述了 2-炔基苯甲醛、磺酰肼和环丙烷-1,1-二甲酸二甲酯在三氟甲磺酸银 (I) 和高氯酸镍 (II) 六水合物共催化下的三组分反应,得到 2,3,4, 11b-四氢-1H-哒嗪并[6,1-a]异喹啉,产率中等至良好。提出了一种可能的反应途径,通过串联 6-内环化和 [3+3] 环加成序列进行。