[2+2+2] cycloaddition reactions of α,β -unsaturated N -arylaldimines, acetylenedicarboxylates and 2-arylidene-1,3-indanediones
作者:Wen-Juan Yang、Jing Zhang、Jing Sun、Ya-Jing Xie、Chao-Guo Yan
DOI:10.1016/j.tet.2017.05.019
日期:2017.6
The domino [2+2+2] cycloaddition reaction of α,β-unsaturated N-arylaldimines, dialkyl acetylenedicarboxylates and 2-arylidene-1,3-indanediones in dry methylene dichloride at room temperature afforded isomeric 2′-styryl-1,2′,3,4′-tetrahydro-1′H-spiro[indene-2,3′-pyridines] in good yields. Under similar conditions, the reaction of α,β-unsaturated N-arylaldimines with two molecules of dialkyl acetylenedicarboxylates
室温下,在干燥的二氯甲烷中,α,β-不饱和N-芳基亚胺,二烷基乙炔二羧酸酯和2-芳基-1,3-茚二酮的多米诺[2 + 2 + 2]环加成反应得到异构体2'-苯乙烯基-1,2 ',3,4'-四氢-1' ħ -螺[茚-2,3'-吡啶]以良好的收率。在相似的条件下,α,β-不饱和N-芳基亚胺与两个分子的二烯丙基二羧酸二烷基酯的反应产生了1-芳基-6-苯乙烯基-1,6-二氢吡啶-2,3,4,5-四羧酸酯。另外,α,β-不饱和氮的三组分反应-芳基亚胺,二甲基乙酰二羧酸二甲酯和苯甲酰氰也得到异构体1,3-恶嗪-4,5-二羧酸酯。