作者:Takeo Taguchi、Mineo Nishi、Kenzo Watanabe、Teruaki Mukaiyama
DOI:10.1246/cl.1973.1307
日期:1973.12.5
It was found that 2-alkyl-2-(4-pyridyl)-1,3-dithiane [II] is obtained in fairly good yield by the reaction of 2-alkyl-2-lithio-1,3-dithiane with pyridine followed by the subsequent oxidation with p-benzoquinone or air. N-Acyl-1,4-dihydropyridine derivative [III] was isolated by treating the adduct [I] of 2-alkyl-2-lithio-1,3-dithiane and pyridine with acyl chloride. Further, it was found that 2,2′-dipyridyl is obtained in 74% yield by refluxing 2-benzyl-2-lithio-1,3-dithiane with excess amount of pyridine in tetrahydrofuran.
研究发现,2-烷基-2-硫代-1,3-二噻烷与吡啶反应,然后用对苯醌或空气氧化,可以得到产率相当高的 2-烷基-2-(4-吡啶基)-1,3-二噻烷[II]。通过用酰氯处理 2-烷基-2-硫代-1,3-二噻烷和吡啶的加合物 [I],分离出了 N-酰基-1,4-二氢吡啶衍生物 [III]。此外,通过在四氢呋喃中回流 2-苄基-2-硫代-1,3-二噻烷和过量的吡啶,发现 2,2′-二吡啶的收率为 74%。