Application of N,3-diaryl-3-oxo-propanethioamide in synthesis: an efficient and mild domino approach to highly substituted fused chromenones
作者:Sreenivas Avula、Jagadeesh Babu Nanubolu、Rambabu Yadla
DOI:10.1016/j.tet.2014.06.044
日期:2014.9
2-c]chromen-5-one and 7,7-dimethyl-7,8-dihydro-4H-chromen-5(6H)-one derivatives possessing 3-(2-chlorobenzoyl)-2-phenylamino-substituents further cyclized under basic conditions to yield penta-cyclic 7,13-diaryl-5,14-dioxa-13-aza-benzo[a]naphthacen-6,8(7H,13H)-dione and tetra-cyclic 6,12-diaryl-3,3-dimethyl-3,4-dihydro-2H-chromeno[2,3-b]quinolin-1,11(6H,12H)-dione, respectively.
从β-芳酰基-硫代乙酰苯胺,芳族醛和2-基化合物轻松快速合成迄今未知的3-芳酰基-4-芳基-2-苯基氨基-4 H-苯并[ g ]色烯-5,10-二酮首次公开了通过InCl 3催化一锅三组分串联Knoevenagel缩合反应的羟基-1,4-萘醌-迈克尔加成-分子内环化-消除反应顺序。此多米诺协议已用于获得高度取代的吡喃并[3,2- c ] chromen-5(4 H)-ones和7,7-二甲基-7,8-dihydro-4 H -chromen-5(6 H)从-酮ñ,3-二芳基-3-氧代丙硫酰胺,芳族醛和4-羟基香豆素或二甲酮在温和的反应条件下。提出了合理的反应机理。具有3(2-氯苯甲酰基)的4 H-吡喃并[3,2- c ] chromen -5-one和7,7-二甲基-7,8 -dihydro-4 H -chromen-5(6 H)-one衍生物)-2-苯基氨基取代基在碱性条件下进一步环化,生成五环7