In the presence of Na2CO3, the [3+2] cycloaddition of azaoxyallyl cations in situ formed from α-halohydroxamates with isothiocyanides proceeded smoothly and furnished (Z)-2-iminothiazolidin-4-ones in 25-99% chemical yields. The chemical structure of title compounds was firmly confirmed by an X-ray single crystal structure analysis.
New Methods for the Synthesis of 2-Aminothiazolones
作者:Seb Caille、Eric A. Bercot、Sheng Cui、Margaret M. Faul
DOI:10.1021/jo702369f
日期:2008.3.1
[GRAPHICS]Two new methods for the synthesis of 2-aminothiazolones from 2-(4-methoxybenzylthio)acetic acids are described. A single reagent and simple experimental conditions are used in the key tandem deprotection-cyclization process. In the first approach 2-aminothiazolones are directly accessed via cyclization of the corresponding N-acylisothioureas. The second complementary approach provides access to a variety of 2-thiomethylthiazoiones via cyclization of N-acyldithioimidates. The product 2-thiomethylthiazol ones are then efficiently converted to 2-aminothiazolones via amine displacement.
Eberly; Dains, University of Kansas Science Bulletin, 1936, vol. 24, p. 45,46
作者:Eberly、Dains
DOI:——
日期:——
Schaumann,E. et al., Chemische Berichte, 1974, vol. 107, p. 3574 - 3588