A Simple Approach to the Synthesis of 2H-1-Benzopyrans and 3H-Naphtho[2,1-b] pyran Via Intramolecular Wittig Reactiont  

作　　者：曹卫国 张平生 陈米 沈嵘 丁维钰 

出　　处：《Advances in Manufacturing》1997年第1期83-86,共4页先进制造进展（英文版）

摘　　要：In the presence of K2CO3, 2-hydroxyethyltripheny phosphonium bromide (1) reacts with substituted salicylaldehyde (2) and 2-hydroxy-1 naphthaldehyde (4) at 110 ℃ in a sealed tube. The title compounds were prepared in medium yield. The ratio of bromide (1) to aldehyde derivatives was also discussed in this paper.In the presence of K2CO3, 2-hydroxyethyltripheny phosphonium bromide (1) reacts with substituted salicylaldehyde (2) and 2-hydroxy-1 naphthaldehyde (4) at 110 ℃ in a sealed tube. The title compounds were prepared in medium yield. The ratio of bromide (1) to aldehyde derivatives was also discussed in this paper.

关 键 词：PHOSPHORANE aldehyde bezopyran NAPHTHOPYRAN intramolecular Wittig reaction 

分 类 号：TB[一般工业技术]