Reaction of N-Heterocycles with Acetylenedicarboxylates in the Presence of N-Alkylisatins or Ninhydrin. Efficient Synthesis of Spiro Compounds
作者:Issa Yavari、Zinatossadat Hossaini、Maryam Sabbaghan、Majid Ghazanfarpour-Darjani
DOI:10.1007/s00706-007-0662-x
日期:2007.7
The 1,3-dipolar intermediates generated by addition of isoquinoline, to dialkyl acetylenedicaboxylates are trapped by N -alkylisatins to produce dialkyl 1,2-dihydro-2-oxo-1-alkylspiro[3 H -indol-3,2′-[2 H ,11b H ][1,3]oxazino[2,3- a ]isoquinoline]-3′,4′-dicarboxylates in excellent yields. The reaction of isoquinoline, quinoline, or pyridine with dimethyl acetylenedicarboxylate in the presence of ninhydrin
通过将异喹啉加成到乙炔基二羧酸二烷基酯上而生成的1,3-偶极中间体被 N- 烷基isatins捕获, 生成1,2-二氢-2-氧-2-氧-1-烷基螺二烷基[3 H- 吲哚-3,2 '-[ 2 H ,11b H ] [1,3]恶嗪基[2,3- a ]异喹啉] -3',4'-二羧酸盐具有优异的收率。在茚三酮存在下异喹啉,喹啉或吡啶与乙酰二羧酸二甲酯的反应可生成1,2-二氢-1,3-二氧杂螺二甲基[3 H- 茚-3,2'-[2 H ,11b H ] [ 1,3]恶嗪[2,3- a ]异喹啉] -3',4'-二羧酸酯,1,2-二氢-1,3-二氧杂螺[2 H -茚-3,3'[3 H ,4a H ] [1,3]恶嗪基[3,2- a ]喹啉] -1,2-二羧酸酯或二甲基1,2-二氢-1,3-二氧杂螺[ 3 H- 茚-3,2'-[2 H ,9a H ]吡啶基 [2,1- b ] [1,3]恶嗪基] -3,4-二羧酸酯。