The chemistry of 5-oxodihydroisoxazoles. Part 19.1 The synthesis and photolysis of N-thioacylisoxazol-5(2H)-ones
作者:Rolf H. Prager、Max R. Taylor、Craig M. Williams
DOI:10.1039/a700646b
日期:——
5-Oxodihydroisoxazoles react with thiocarbonyl chlorides to afford
N-thioacylisoxazol-5(2H)-ones which lose carbon
dioxide under photochemical conditions and undergo intramolecular
cyclisation of the iminocarbene to afford thiazoles. However, in some
cases loss of carbon dioxide is accompanied by loss of sulfur, giving
1,3-oxazin-6-ones.
5-氧代二氢异喹嗪与硫酰氯反应,生成N-硫酰异喹嗪-5(2H)-酮,这些化合物在光化学条件下失去二氧化碳,并经历亚胺碳烯的分子内环化反应,形成噻唑。然而,在某些情况下,失去二氧化碳的同时伴随失去硫,生成1,3-噁嗪-6-酮。