Novel syntheses of some new 3,4-dihydrospiro{benzimidazo[1,2-a]pyridine-3,3′-indolin}-2′-one derivatives
摘要:
2-Methylbenzimidazole 1 reacted with 3-dicyanomethylidine-1-ethyl-2-oxoindoline 2 in ethyl acetate to afford 1-amino-2-cyano-3,4-dihydro-1'-ethylspiro{benzimidazo[1,2-a]pyridine-3,3'-indolin}-2'-one 6, which was used as a key intermediate in the synthesis of fused spiropolyheterocyclic derivatives of benzimidazopyridopyrimidine and/or benzimidazonaphthyridine nucleus incorporating an indoline moiety.
Novel syntheses of some new 3,4-dihydrospiro{benzimidazo[1,2-a]pyridine-3,3′-indolin}-2′-one derivatives
摘要:
2-Methylbenzimidazole 1 reacted with 3-dicyanomethylidine-1-ethyl-2-oxoindoline 2 in ethyl acetate to afford 1-amino-2-cyano-3,4-dihydro-1'-ethylspiro{benzimidazo[1,2-a]pyridine-3,3'-indolin}-2'-one 6, which was used as a key intermediate in the synthesis of fused spiropolyheterocyclic derivatives of benzimidazopyridopyrimidine and/or benzimidazonaphthyridine nucleus incorporating an indoline moiety.
A novel one-pot multi-component synthesis of 3,3’-disubstituted oxindole and spirooxindole scaffolds via Sn-catalyzed C(sp<sup>3</sup>)–H functionalization of azaarenes by sequential Knoevenagel–Michael-cyclization reaction
作者:Santosh S. Chavan、Mohsinkhan Y. Pathan、Shridhar H. Thorat、Rajesh Gonnade、Shafeek A. R. Mulla
DOI:10.1039/c5ra16334j
日期:——
Sn-catalyzed C(sp3)–H bond functionalization of 2-methyl azaarenes/2-(azaaryl)methanes has been achieved for the first time in a one-pot reaction with isatin and active methylene compounds.