Synthesis and Deprotection of 1, 3-Dithianes and 1, 3-Dithiolanes by Polyphosphoric Acid

Y Jin, W Zhang, D Zhang, LM Qiao…

Index: Jin, Yong-Sheng; Zhang, Wei; Zhang, Da-Zhi; Qiao, Li-Ming; Wu, Qiu-Ye; Chen, Hai-Sheng Asian Journal of Chemistry, 2011 , vol. 23, # 3 p. 1117 - 1119

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Abstract

Many procedures are available for the preparation of thioacetals or thioketals; dethioacetalization or dethioketalization, however, is not always an easy step1. Traditionally, deprotection of thioacetals or thioketals3 has required drastic conditions, stoichiometric or an excess amount of toxic reactives such as Hg2+ salts and other heavy metal salts from Bi3+, Zn2+, Zr2+, V5+, Ce3+, Ta5+, SbCl54 or SeO2. In addition, there are methods of alkylation (such as MeI)5 or oxidative ...