secondary alkylamines with activemethylenecompounds afforded mono-sulfenylated compounds in good yields. The reactions of 2 mol of sulfenamides derived from imides with 1 mol of activemethylenecompounds in the presence of a base gave di-sulfenylated compounds. It was found that α-mono-sulfenylated ketones were prepared by the reactions of enamines with sulfenamides derived from imides. α-gem-Di-sulfenylated
A Palladium-Catalyzed Regio- and Stereoselective Four-Component Coupling Reaction
作者:Daniel J. Knapton、Tara Y. Meyer
DOI:10.1021/jo0484068
日期:2005.2.1
Pd(PPh3)4 catalytically assembles sulfenamide, alkyne, carbon monoxide, and diphenyl diselenide regio- and stereoselectively in a one-pot four-componentcoupling reaction to yield (Z)-β-selenyl acrylamides. The reaction proceeds in good to excellent yields (60−95%) and is tolerant of a range of functional groups on both the nitrogen of the sulfenamide and the alkyne. Moderate selectivities ranging
N-hydroxypyridine-2(1H)-thione derivatives of carboxylic acids as activated esters. Part I. The synthesis of carboxamides
作者:Derek H.R. Barton、J. Albert Ferreira
DOI:10.1016/0040-4020(96)00487-5
日期:1996.7
The reaction between an acyl derivative of N-hydroxypyridine-2(1H)-thione (a Barton PTOC ester) and either an amine (primary or secondary), or the corresponding sulfenamide, led to the formation of a carboxamide in a clean transformation requiring minimal work-up and purification. The reaction with a sulfenamide is particularly useful since the only by-product, an unsymmetrical disulfide, is of both
Lewis acid-catalyzed insertion of isocyanides 2 into nitrogen–sulfur bonds of sulfenamides 1 was developed. This method provided a convenient method for the synthesis of isothioureas 3. Among Lewis acids examined, AlCl3 brought about the best result. Acetic acid assisted one-pot preparation of unsymmetrical ureas was also described.
The sulphur(<scp>II</scp>)–nitrogen bond. Part II. The transamination of diamino sulphides and sulphenamides
作者:D. A. Armitage、M. J. Clark、A. M. White
DOI:10.1039/j39710003141
日期:——
The application of transamination to diaminosulphides and to benzene- and methane-sulphenamides gives high yields of sulphur(II) nitrogen compounds. The mixtures resulting from secondary amines and methanesulphenyl chloride can be conveniently separated by use of this reaction. Transamination of gem-diamines has been observed.