Synthesis of Naphthalene Derivatives through Platinum(II)-Catalyzed Reaction of 2-Alkynylbenzoates with Vinyl Ethers
作者:Nobuharu Iwasawa、Hiroyuki Kusama、Hideaki Funami
DOI:10.1055/s-2007-983737
日期:2007.7
for the preparation of 1-acyl-4-alkoxy- or 1-acyl-4-alkylsulfanylnaphthalenes has been developed by the PtCl 2 -catalyzed reaction of O-ethynylbenzoates or benzothioates with vinyl ethers. Treatment of O-alkynylbenzoate derivatives with PtCl 2 generated the platinum(II)-containing carbonyl ylides as a key reactive intermediate and these species reacted with vinyl ethers to give substituted naphthalenes
通过 PtCl 2 催化的 O-乙炔基苯甲酸酯或苯硫代苯甲酸酯与乙烯基醚的反应,开发了一种制备 1-酰基-4-烷氧基-或 1-酰基-4-烷基硫烷基萘的简明方法。用 PtCl 2 处理 O-alkynylbenzoate 衍生物产生含铂 (II) 的羰基叶立德作为关键的反应中间体,这些物质与乙烯基醚反应以良好的收率得到取代的萘。通过对O-乙炔基苯甲酸酯和[PtCl 2 (H 2 C=CH 2 )] 2 的混合物的NMR分析证实了含铂羰基内酯的存在。此外,有人提出萘衍生物是通过叶立德物质与乙烯基醚的 [3+2] 环加成反应,然后生成的铂-卡宾中间体进行 1,2-烷基迁移而产生的。