Thio acetals and ketals derived from aldehydes and ketones are readily deprotected by clayfen within seconds under solvent-free conditions. This rapid and environmentally benign method avoids the use of excess solvents and toxic oxidants usually employed in the dethioacetalization process. (C) 1997 Elsevier Science Ltd.
Ecofriendly Fast Batch Synthesis of Dioxolanes, Dithiolanes, and Oxathiolanes without Solvent under Microwave Irradiation
摘要:
2,2-Dimethoxypropane and 3,3-dimethoxypentane react with 1,2-ethanediol, thio, and oxathio analogues to give the corresponding protected carbonyls in high yield under mild solvent-free conditions, These environmentally benign conditions under microwave irradiation are applied to a large-scale synthesis.
Zirconium(IV) chloride-silica catalysed thioacetalisation of carbonyl compounds
作者:Harish K Patney、Simon Margan
DOI:10.1016/0040-4039(96)00892-1
日期:1996.6
Anhydrous anhydrous zirconium(IV) chloride dispersed on silica gel efficiently thioacetalised a variety of carbonylcompounds in near quantitative yields
Anhydrous cobalt(II) bromide dispersed on silica gel: A mild and efficient reagent for thioacetalisation of carbonyl compounds
作者:Harish K. Patney
DOI:10.1016/s0040-4039(00)77287-x
日期:1994.8
Anhydrous cobalt(II) bromide dispersed on silica gel has been shown to be a very efficient reagent system for thioacetalisation of a variety of aldehydes and ketones at room temperature.