83075-05-2Relevant articles and documents
Heteropoly acids as heterogeneous catalysts for thioacetalization and transthioacetalization reactions
Firouzabadi,Iranpoor,Amani
, p. 59 - 62 (2007/10/03)
Heteropoly acids are effective solid catalysts for the thioacetalization of carbonyl compounds. Tungstophosphoric acid (H3PW12O40), was found to be an effective and a highly selective catalyst for the thioacetalization of aldehydes, ketones and for the transthioacetalization of acetals, acylals and O,S-acetals which proceeded in excellent yields in the absence of solvent. The catalyst has also been successfully applied to the chemoselective conversion of α- or β-diketones and a β-keto ester into the corresponding dithioacetals. Sterically hindered carbonyl compounds such as camphor and benzophenone were also converted to their corresponding thioacetals in refluxing petroleum ether in 89-94percent yields. Surprisingly, anthrone was reduced to anthracene in 91percent yield.
FORMATION AND NMR STUDY OF SOME CYCLIC β-KETODITHIOACETALS
Barros, M. T.,Geraldes, C. F. G. C.,Maycock, C. D.,Silva, M. I.
, p. 2283 - 2288 (2007/10/02)
An efficient method has been found for the preparation of cyclic monodithioacetals of 1,3-dicarbonyl compounds using boron trifluoride etherate as the acid catalyst.Asymmetric 1,3-diketones react regioselectively in most of the cases tried.A study of the
