2-Thioxo-1,3-thiazepan-4-ones, a novel class of cyclic dithiourethanes with a 7-membered ring system
作者:Wolfgang Hanefeld、Harald Schütz
DOI:10.1002/jhet.5570360509
日期:1999.9
Reaction of isothiocyanates 1 with γ-thiobutyrolactone (2) in alkaline medium yielded 4-thiocarbamoylthiobutyric acids 3 after acidification, which could be cyclized to the 2-thioxo-1,3-thiazepan-4-ones 6. Additional reactions were observed with the formation of 6t from p-phenylenediisothiocyanate (1s) and with the formation of 6w from benzyl isothiocyanate (1t). 3-Acetylamino-γ-thiobutyrolactone (7)
异硫氰酸酯1与γ-硫代丁内酯(2)在碱性介质中的反应在酸化后产生4-硫代氨基甲酰基硫代丁酸3,可将其环化为2-thioxo-1,3-thiazepan-4-ones 6。观察到另外的反应,由对苯二异硫氰酸酯形成6t(1s),由异硫氰酸苄酯形成6w(1t)。3-乙酰氨基-γ-硫代丁内酯(7)也可用于该反应,生成丁酸衍生物3u-3w。环化产生1,3-硫氮杂derivatives衍生物6x,y其在环收缩下重排至1,3-噻嗪酮8a,b。