A robust three-component synthesis of dispiroheterocycles containing aurone scaffold via 1,3-dipolar cycloaddition reaction of azomethine ylides: regioselectivity and mechanistic overview using DFT calculations
作者:Zohreh Esmaeeli、Mohammad Reza Khodabakhshi、Zohreh Mirjafary、Hamid Saeidian
DOI:10.1007/s11224-021-01830-x
日期:2022.2
a three-component 1,3-dipolar cycloaddition reaction of azomethine ylide and ( Z )-2-benzylidene-6-methoxybenzofuran-3(2H)-one derivatives in excellent yields (60–94%). The structures of all the desired products were fully confirmed by 1 H NMR, 13 C NMR, and FT-IR spectral data and CHN elemental analysis. In the second part of the paper, the 1,3-dipolar cycloaddition reaction between N -(1,3-dioxo-1
通过偶氮甲碱叶立德和 (Z)-2-benzylidene-6-methoxybenzofuran-3(2H)-one 衍生物的三组分 1,3-偶极环加成反应,报道了 12 种新型双螺杂环的高区域选择性合成,产率高(60–94%)。所有所需产物的结构均通过 1 H NMR、13 C NMR、FT-IR 光谱数据和 CHN 元素分析得到充分证实。在论文的第二部分,N-(1,3-dioxo-1,3-dihydro-2H-inden-2-ylidene)-N-methylmethanideminium II 作为 1,3 -dipole 和 2-benzylidene-6-methoxybenzofuran-3(2H)-one III 作为亲偶极体,在 B3LYP/6–31 + + G(d, p) 计算水平上使用密度泛函理论 (DFT) 进行了理论上的研究,以摆脱阐明区域选择性和机械方面。考虑了两