A new and efficient synthesis of highly functionalized (triphenylphosphoranylidene)cyclopentadienes with zwitterionic resonance structures

被引：11

作者：

Alizadeh, A ^{[1
]}

机构：

[1] Tarbiat Modares Univ, Dept Chem, Tehran, Iran

来源：

HELVETICA CHIMICA ACTA | 2005年 / 88卷 / 02期

关键词：

D O I：

10.1002/hlca.200590012

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Different esters of 2-aryl-4-hydroxy-3-nitro-5-(triphenylphosphoranylidene)cyclopenta-1,3-diene-1-carboxylates 1 were prepared in excellent yields from the 1:1:1 reaction between Ph3P, dialkyl acetylenedicarboxylates 2, and (substituted) 2-(nitroethenyl)benzenes 3 (Scheme 1). The structures of the highly functionalized compounds 1 were corroborated spectroscopically (IR, H-1-, C-13-, P-31-NMR, EI-MS) and by elemental analyses. A plausible mechanism for this type of cyclization is proposed (Scheme 2).

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页码：304 / 308

页数：5

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