Tandem Construction of Indole-Fused Phthalazines from (2-Alkynylbenzylidene)hydrazines under Metal-Free Conditions
摘要:
An efficient approach to invent diversely substituted indole-fused phthalazines from in situ formed(2-alkynylbenzylidene)hydrazines under metal-free conditions via selective radical cyclization has been developed. Notably, this 6exo-dig addition-cyclization tandem procedure proceeds under air atmosphere and shows a broad substrate suitability, as well as avoids harmful byproducts, which complies with the concept of green synthesis.
An efficient three-step synthesis of a new heterocyclic system is described wherein the 2H-bis([1,2,3]triazolo)[5,1-a:4′,5′-c]isoquinoline ring system is elaborated using a simple synthetic strategy. The approach permits the preparation of target compounds in high yields using readily available arylhydrazines and o-alkynylbenzaldehydes as starting materials. The photophysical properties of the prepared
描述了一种新的杂环系统的有效三步合成方法,其中使用以下方法精心合成了2 H -bis([1,2,3] triazolo)[5,1- a:4',5'- c ]异喹啉环系统一个简单的综合策略。该方法允许使用容易获得的芳基肼和邻炔基苯甲醛作为起始原料以高收率制备目标化合物。研究了所制备的杂环的光物理性质,以证明所制备的化合物是有吸引力的发蓝光的荧光团,其量子产率高达98%,斯托克斯位移高达67 nm。揭示了位阻对吸收和发射光谱的强烈影响。