Aliphatic thioacetate deprotection using catalytic tetrabutylammonium cyanide
摘要:
A series of thiol-functionalized organic compounds were selected to analyze the scope and efficiency of a new thioacetate deprotection method using catalytic tetrabutylammonium cyanide (TBACN) to effect the transformation of a thioacetate group to a free thiol in the presence of a protic solvent. Particularly attractive are the mild reaction and workup conditions, reduced byproduct formation typically seen using literature methods and yields of greater than 80% for the free aliphatic thiols. This method is effective on aliphatic thiols with trityl, benzyl, p-halo-benzyl, phenethyl, phenoxyethyl, and cyclohexylethyl structural moieties, but it is not effective with thiophenols. Published by Elsevier Ltd.
Cysteine Isocyanide in Multicomponent Reaction: Synthesis of Peptido-Mimetic 1,3-Azoles
作者:Thimmalapura M. Vishwanatha、Katarzyna Kurpiewska、Justyna Kalinowska-Tłuścik、Alexander Dömling
DOI:10.1021/acs.joc.7b01615
日期:2017.9.15
An alternative approach toward the simple and robust synthesis of highly substituted peptidic thiazole derivatives using Ugi-multicomponent reaction (U-MCR) is described. Thus, we introduced the enantiopure (R)-2-methyl-2-isocyano-3-(tritylthio)propanoate as a novel class of isocyanide in MCR. This bifunctional isocyanide was found to undergo mild cyclodehydration to afford thiazole containing peptidomimetics
A Convenient Synthesis of Thioacetates and Thiobenzoates Using Silica-Gel Supported Potassium Thioacetate
作者:Tadashi Aoyama、Toshio Takido、Mitsuo Kodomari
DOI:10.1081/scc-120025193
日期:2003.11
Abstract A simple and efficient procedure has been developed for the synthesis of thioesters by a reaction of alkyl halides with silica-gel supported potassium thioacetate or thiobenzoateunder mild conditions.
Cleavage of the Carbon—Sulfur Bond. Rates of the Basic and the Acid-catalyzed Hydrolysis of Allyl, Benzyl and Trityl Thioacetates, and the Corresponding Acetates in Aqueous Acetone Solution
作者:Betsy K. Morse、D. Stanley Tarbell
DOI:10.1021/ja01122a039
日期:1952.1
Wheeler, American Chemical Journal, 1901, vol. 26, p. 353
作者:Wheeler
DOI:——
日期:——
1073. Thiocyanogen, thiocyanates, and isothiocyanates. Part III. Substitution reactions of triphenylmethyl isothiocyanate with acids and salts