2,4-Bis(4-methoxyphenyl)-1,3,2,4-dithiadiphosphetane-2,4-disulfide (Lawesson’s Reagent, LR, 1) reacts with cycloalkylidenecyanoth ioacetamides (2 and 3) to give 5-cyano-2-(4-methoxyphenyl)spiro [cyclopentane(cyclohexane)-1,6 -perhydro-[1,3,2]thiazaphosphixane] 2 ,4 -disulfide (4 and 5). The reaction of compounds 4 and 5 with -halo compounds led to the formation of the substituted thio-compounds 6a–e and 7a–e, respectively, these compounds, upon treatment with sodium ethoxide, produce the corresponding thienothiazaphosphixine derivatives 8a–e and 9a–e ... إقراء المزيد