PHOTOSENSITIZED CLEAVAGE OF THE DITHIOPROTECTING GROUP BY VISIBLE-LIGHT

被引：27

作者：

EPLING, GA

WANG, QX

机构：

[1] Department of Chemistry, University of Connecticut, Storrs

来源：

TETRAHEDRON LETTERS | 1992年 / 33卷 / 40期

关键词：

ELECTRON TRANSFER; PHOTOFRAGMENTATION; DITHIANES; DITHIOLANES; PHOTOLYSIS;

D O I：

10.1016/S0040-4039(00)61086-9

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

Dithio derivatives of aldehydes and ketones have been deprotected under neutral conditions using visible light provided by a 120 Watt spotlight and methylene green as a sensitizer. The key step in the deprotection is apparently an electron transfer from the dithio derivative to the electronically excited visible dye. The resulting dithio radical cation undergoes fragmentation, and the corresponding aldehydes and ketones are isolated in excellent yields.

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页码：5909 / 5912

页数：4

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