Nickel(II) chloride hexahydrate catalyzed reaction of aromatic aldehydes with 2-mercaptoethanol: formation of supramolecular helical assemblage of the product
作者:Rajibul A. Laskar、Naznin A. Begum、Mohammad Hedayetullah Mir、Md. Rumum Rohman、Abu T. Khan
DOI:10.1016/j.tetlet.2013.08.070
日期:2013.10
Various aromatic aldehydes on reaction with 2-mercaptoethanol provided an unanticipated product, bis(2-hydroxyethyl)dithioacetals (3) as the major product along with the expected product 1,3-oxathiolanes (4) in the presence of 0.05 equiv amount of nickel(II) chloride hexahydrate (NiCl2·6H2O) under solvent-free conditions. Products 3c and 3e exhibit an interesting hydrogen-bonded infinite supra-molecular
Thioacetalization of the nitrobenzaldehydes with 2-mercaptoethanol is easily carried out in the presence of TMSCl and dichlorodimethylsilane without heating and using of additional solvent. The reaction direction is defined by the reagents ratio and led to formation of bis(2hydroxyethyl)dithioacetals (yield 76-91%) or 1,3-oxathiolanes (yield 76-91%). Bis(2-hydroxyethyl)dithioacetals are easily transformed in the corresponding
A mild and efficient method for the oxidative deprotection of 1,3-oxathiolanes with Fe(NO3)(3)center dot 9H(2)O and Cu(NO3)(2)center dot 3H(2)O in the absence of solvent is reported. (C) 2010 Farhad Shirini. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.
Chauhan; Kumar, Anil; Sahoo, Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 2003, vol. 42, # 10, p. 2635 - 2637