Various aldehydes have been protected with different thiols as dithioacetals with excellent yields using anhydrouscoppersulfate 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.
De, Surya Kanta, Synthesis, 2004, # 6, p. 828 - 830
作者:De, Surya Kanta
DOI:——
日期:——
Scandium triflate as a recyclable catalyst for chemoselective thioacetalization
作者:Ahmed Kamal、Gagan Chouhan
DOI:10.1016/s0040-4039(01)02378-4
日期:2002.2
Scandium triflate [Sc(OTf)(3)] has been found to be an extremely efficient and recyclable catalyst for the addition of ethanethiol, 1,2-ethanedithiol and 1,3-propanedithiol to both aromatic and aliphatic aldehydes. In addition, by employing this catalyst, high chemoselective thioacetalization of carbonyl compounds has been achieved. (C) 2002 Elsevier Science Ltd. All rights reserved.
Chemoselective thioacetalization and transthioacetalization of carbonyl compounds catalyzed by immobilized scandium(III) triflate in ionic liquids
作者:Ahmed Kamal、Gagan Chouhan
DOI:10.1016/s0040-4039(03)00580-x
日期:2003.4
Immobilized scandium triflate [Sc(OTf)(3)] in ionic liquids has been found to be an extremely efficient and recyclable catalyst for the thioacetalization and transthioacetalization of both aromatic and aliphatic aldehydes. Significant rate acceleration and chemoselectivity was achieved by employing this catalytic system. (C) 2003 Elsevier Science Ltd. All rights reserved.
Froeling,A.; Arens,J.F., Recueil des Travaux Chimiques des Pays-Bas, 1962, vol. 81, p. 1009 - 1023