Poly(N-bromobenzene-1,3-disulfonamide) and N,N,N′,N′-tetrabromobenzene-1,3-disulfonamide as a mild and efficient catalyst for chemoselective thioacetalization of carbonyl functions and transthioacetalization reactions
Poly(N‐bromobenzene‐1,3‐disulfonamide) and N,N,N′,N′‐tetrabromobenzene‐1,3‐disulfonamide are effective catalysts for chemoselective dithioacetalization of aldehydes in the presence of ketones under neutral conditions. J. Heterocyclic Chem., (2011).
The thioacetalisation of a variety of heterocyclic, aromatic, and aliphatic carbonyl compounds (1 mmol) with ethane-1,2-dithiol (1 mmol) using silica sulphuric acid (SSA) is presented as an efficient heterogeneous catalyst under mild and solvent-free conditions at 60°C. The thioacetals were formed within a short reaction time (1–34 min) and isolated with 90–98 % yield following an extractive procedure
Robbe; Fernandez; Dubief, European Journal of Medicinal Chemistry, 1982, vol. 17, # 3, p. 235 - 243
作者:Robbe、Fernandez、Dubief、et al.
DOI:——
日期:——
Synthese der 2-Methyl-lysergsäure Eine neue<i>Friedel</i>-<i>Crafts</i>-Methode. 74. Mitteilung über Mutterkornalkaloide
作者:P. Stütz、P. A. Stadler
DOI:10.1002/hlca.19720550111
日期:1972.1.31
AbstractThe new reagent 2‐methoxy‐1,3‐dithiolane and cyclic ortho‐thioesters can be used in a new reaction of the Friedel‐Crafts type to introduce the corresponding aldehydic or ketonic thioacetal function directly into substrates containing an indole nucleus with free 2‐ or 3‐position.
Graphene oxide (GO)-catalyzed chemoselective thioacetalization of aldehydes under solvent-free conditions
作者:Babli Roy、Debasish Sengupta、Basudeb Basu
DOI:10.1016/j.tetlet.2014.10.043
日期:2014.11
An efficient method for the synthesis of open chain, cyclic, and unsymmetrical dithioacetals from aryl/hetero-aryl/aliphatic aldehydes is described. The reaction is performed using graphene oxide (GO) as the catalyst under solvent-free and aerobic conditions. High chemoselectivity is observed in the reaction as aryl/alkyl ketones do not give thioketals under the condition. (C) 2014 Elsevier Ltd. All rights reserved.