Mild and Efficient Chemoselective Protection of Aldehydes as Dithioacetals Employing N-Bromosuccinimide
作者:Ahmed Kamal、Gagan Chouhan
DOI:10.1055/s-2002-20469
日期:——
A mild and chemoselective dithioacetalization procedure for the protection of aromatic, aliphatic, and alkenyl aldehydes in presence of catalytic amount of N-bromosuccinimide under neutral conditions is described.
Oxathioacetalization, thioacetalization and transthioacetalization of carbonyl compounds by N-bromosuccinimide: selectivity and scope
作者:Ahmed Kamal、Gagan Chouhan、Kaleem Ahmed
DOI:10.1016/s0040-4039(02)01610-6
日期:2002.9
Efficient oxathioacetalization, thioacetalization and transthioacetalization of carbonylcompounds have been achieved in high yields employing N-bromosuccinimide as a catalyst.
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.
Oida, Tatsuo; Tanimoto, Shigeo; Terao, Hiromu, Journal of the Chemical Society. Perkin transactions I, 1986, p. 1715 - 1726