Molten Salt as a Green Reaction Medium: Efficient and Chemoselective Dithioacetalization and Oxathioacetalization of Aldehydes Mediated by Molten Tetrabutylammonium Bromide
作者:Brindaban C. Ranu、Arijit Das
DOI:10.1071/ch03318
日期:——
Tetrabutylammonium bromide in the molten state has been demonstrated to be a very efficient catalyst and reaction medium for the highly chemoselective dithioacetalization and oxathioacetalization of aldehydes. The tetrabutylammonium bromide is recycled for subsequent reactions.
Pr(OTf)<sub>3</sub> as an Efficient and Recyclable Catalyst for Chemoselective Thioacetalization of Aldehydes
作者:Surya De
DOI:10.1055/s-2004-834858
日期:——
Praseodymium triflate has been found to be an efficient and recyclable catalyst for chemoselective protection of aldehydes.
三氟甲磺酸镨已被发现是一种高效且可循环的催化剂,适用于醛的选择性保护反应。
Chemoselective thioacetalisation and transthioacetalisation of carbonyl compounds catalysed by tetrabutylammonium tribromide (TBATB)Dedicated to Professor Subramanian Ranganathan on the occasion of his 70th birthday.
作者:Sarala Naik、Rangam Gopinath、Mousumi Goswami、Bhisma K. Patel
DOI:10.1039/b402648a
日期:——
Thioacetals and thioketals of various aldehydes and ketones were obtained directly from carbonylcompounds or by a transthioacetalisation process from cyclic O,O-acetals in the presence of dithiols and a catalytic amount of tetrabutylammonium tribromide (TBATB). Chemoselective thioacetalisation of aromatic aldehydes containing an electron-donating group in the presence of an aldehyde containing an
Highly Efficient Transthioacetalization of O,O-Acetals Catalyzed by Indium(III) Chloride
作者:Brindaban C. Ranu、Arijit Das、Sampak Samanta
DOI:10.1055/s-2002-25347
日期:——
A simple, efficient and general procedure has been developed for the transthioacetalization of O,O-acetals catalyzed by indium(III) chloride in 1,2-dichloroethane.
Catalysis by ionic liquids: solvent-free efficient transthioacetalisation of acetals by molten tetrabutylammonium bromideElectronic supplementary information (ESI) avialable: spectral data of S,S-acetals. See http://www.rsc.org/suppdata/p1/b2/b204363g/
作者:Brindaban C. Ranu、Arijit Das、Sampak Samanta
DOI:10.1039/b204363g
日期:2002.6.27
Tetrabutylammonium bromide in molten state has been demonstrated to be a very efficient and recyclable catalyst for transthioacetalisation of O,O-acetals to S,S-acetals under solvent-free conditions.