Various aldehydes have been protected with different thiols as dithioacetals with excellent yields using anhydrous copper sulfate as a mild and chemoselective catalyst. The reaction is carried out in a solvent and/or under solvent-free conditions. The transthioacetalization of oxyacetals into dithioacetals was also achieved in an excellent yield.
使用
无水硫酸铜作为温和的
化学选择性催化剂,各种醛已用不同的
硫醇作为二
硫缩醛进行保护,收率极好。该反应在溶剂中和/或在无溶剂条件下进行。氧
缩醛转
硫代
缩醛化为二
硫代
缩醛也以极好的收率实现。