Facile synthesis of indolizinoindolone, indolylepoxypyrrolooxazole, indolylpyrrolooxazolone and isoindolopyrazinoindolone heterocycles from indole and imide derivatives
作者:Santosh V. Shelar、Narshinha P. Argade
DOI:10.1039/d1ob00754h
日期:——
coupling reactions of indole with imide derivatives leading to unique heterocyclic systems are demonstrated. Acid-induced 3-position coupling reactions of indole with cyclic imide derived lactamols followed by acid promoted 2-position cyclizations with the corresponding aldehydes are described to obtain the indolizinoindolones and benzoindolizinoindolones. Base induced 2-position coupling reactions of N-tosylindole
证明了吲哚与酰亚胺衍生物的化学选择性、区域选择性和非对映选择性偶联反应,导致独特的杂环系统。描述了吲哚与环状酰亚胺衍生的内酰胺的酸诱导 3 位偶联反应,然后与相应的醛进行酸促进的 2 位环化反应,以获得吲哚并吲哚酮和苯并吲哚吲哚吲哚酮。N-甲苯磺酰吲哚与N- (2-碘乙基)酰亚胺的碱诱导2-位偶联反应和随后的环化反应提供吲哚基环氧吡咯并恶唑、吲哚基吡咯并恶唑酮和吲哚基恶唑并异吲哚酮。吲哚基恶唑并异吲哚酮还原裂解为相应的醇,然后甲磺酰化和碱促进的N-环化得到原位空气氧化五环产物羟基异吲哚并吡嗪吲哚酮。从 1,2,5,6,7,11c-hexahydro-3 H -indolizino[7,8 - b ]indol-3-one 到 1,2,5,6,11 的天然产物的区域异构结构修订, 11b-hexahydro-3 H -indolizino(8,7- b )indol-3-one 也报道在本研究中,重点是杂环合成的方法。