1,3-Oxathiolanes from the Reaction of Aromatic and Enolized Thioketones with Monosubstituted Oxiranes
作者:Changchun Fu、Anthony Linden、Heinz Heimgartner
DOI:10.1002/hlca.200390234
日期:2003.8
corresponding 1,3-oxathiolanes (S)-12, (S)-14, and (R)-16, respectively (Schemes 7, 9, and 10). The structures of (1′E,2S)-11, (S)-12, and (S)-14 were confirmed by X-ray crystallography (Figs. 1–3). These results show that 1,3-oxathiolanes can be prepared directly via the Lewis acid-catalyzed reactions of oxiranes with non-enolizable thioketones, and also in two steps with enolized thioketones. The nucleophilic
在路易斯酸等存在下,4,4'-二甲氧基硫代二苯甲酮(1)与(S)-2-甲基环氧乙烷((S)-2)和(R)-2-苯基环氧乙烷((R)-6)的反应作为BF 3 ⋅Et 2 O,氯化锌2,或SiO 2在干燥的CH 2氯2引导到对应的1:1加合物,即,1,3-氧硫杂环戊烷(小号) - 3与我在C(5),和(S)-7和(R)-8Ph分别位于C(4)和C(5)。分别形成1:2加合物1,3,6-二氧杂硫烷(4 S,8 S)-4和1,3-二氧戊环(S)-9作为次要产物(方案3和5,表1和2)。的1的治疗:1加合物(小号- )3与(小号) - 2和BF 3 ⋅Et 2 ö得到1:2加合物(4小号,8小号) - 4(方案4)。如果是烯醇化的硫酮1,3-二苯丙-1-烯-2-硫醇(10)与(小号) - 2和(- [R )- 6以SiO存在2中,enesulfanyl醇(1' Ž,2小号) - 11和(1' ë,2小号)