作者:Klaus Schweiger、Manfred Schubert-Zsilavecz、Robert Weis、Ferdinand Belaj
DOI:10.1007/bf01045306
日期:——
Aminolyses of 4-dialkylamino-2-methylthiothiopyranes halides with ammonia leads to 4-amino-2-dialkylaminothiopyranylium halides. On treatment with alkali these products are hydrolyzed to N,N-dialkyl-3-amino-2,4-hexadienthioamides, which react with peroxide under oxidative cyclization to 5-dialkylamino-1,2-thiazoles. In order to determine the structures of the unsaturated thioamides and isothiazoles C-13-NMR-spectroscopic analysis and a single crystal X-ray structure analysis of 5-dimethylamino-3-(2-methyl-1-propenyl)-1,2-thiazole (6a) at 100 K were carried out: C9H14N2S, M(r) = 182.28, monoclinic, P 2(1)/a, a = 11.622(2), b = 6.303(1), c = 13.678(2), beta = 104.49(3)-degrees, V = 970.1 (3)angstrom3, Z = 4, d(x) = 1.248 g/cm3, mu = 27.0 mm-1, R = 4.93%, R(w) = 4.84% (1672 observations, 157 parameters).