New 1,3-dithiol-2-ylidene derivatives, notably π-extended systems, have been synthesised by Wittig reactions of phosphorane and phosphonate ester derivatives of 1,3-dithiole with activated ketones and α,β-unsaturated ketones. Nitrosation reactions of a range of these π-extended systems, results in the formation of nitroalkenes, via unstable nitrosoalkene intermediates, which, in general, could not be
通过1,3-二
硫醇的膦烷和
膦酸酯衍
生物与活化的酮和α,β-不饱和酮的Wittig反应合成了新的1,3-二
硫醇-2-亚烷基衍
生物,特别是π-扩展体系。一系列此类π扩链系统的亚硝化反应会通过不稳定的亚硝基链烯中间体形成硝基链烯,而这些中间体通常无法分离。1-(4,5-二苯甲氧基-1,3-二
硫醇-2-亚烷基)-1-
氰基-1-苯基
甲烷的X射线晶体结构揭示了分子内电子从二
硫醇环向环的转移程度很小。共轭
氰基。