Cyanuric chloride-catalyzed thioacetalization for organocatalytic synthesis of thioacetals
作者:Yaqin Liu
DOI:10.1080/10426507.2015.1054934
日期:2016.5.3
GRAPHICAL ABSTRACT ABSTRACT The thioacetalization of aromatic aldehydes has been realized with broad diversity in the presence of various thiols and thiophenols using cyanuric chloride as an organocatalyst.
Investigations Towards the Chemoselective Thioacetaliztion of Carbonyl Compounds by Using Ionic Liquid[bmim]Br as a Recyclable Catalytic Medium
作者:Ahmed Kamal、Gagan Chouhan
DOI:10.1002/adsc.200303171
日期:2004.4
The ionicliquid based on the 1-n-butyl-3-methylimidazolium cation has been prepared and used as an efficient catalytic medum for the chemoselective thioacetalization of carbonylcompounds. Furthermore, recycling and reuse of this ionicliquidmedium has been demonstrated. Moreover, the use of this catalyticmedium not only avoids the generation of waste but also provides a green process with minimal
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.
Hafnium Trifluoromethanesulfonate (Hafnium Triflate) as a Highly Efficient Catalyst for Chemoselective Thioacetalization and Transthioacetalization of Carbonyl Compounds
作者:Yan-Chao Wu、Jieping Zhu
DOI:10.1021/jo8021988
日期:2008.12.5
A range of carbonyl compounds including aliphatic and aromatic aldehydes and ketones were converted to the corresponding thioacetals in high yields in the presence of a catalytic amount of hafnium trifluoromethanesulfonate (0.1 mol %, room temperature), The mild conditions tolerated various sensitive functional and protecting groups and were racemization-free when applied to alpha-aminoaldehydes. Transacetalization and chemoselective thioacetalization of aromatic aldehydes in the presence of aliphatic aldehydes and ketones were also documented.
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.