Reactions of Sulfanyl Chlorides with Thiocamphor and Thiofenchone:WagnerMeerwein Rearrangement of an Intermediate Thiocarbonylium Ion
作者:Agnieszka Majchrzak、Grzegorz Mlostoń、Anthony Linden、Heinz Heimgartner
DOI:10.1002/hlca.200490077
日期:2004.4
intermediacy of a thiocarbonylium ion (Scheme 3). On the other hand, the non-enolizable thiofenchone (13) reacts with sulfanyl chlorides in CH2Cl2/Et3N to give exclusively products with a rearranged bicyclic skeleton (Scheme 5). A WagnerMeerwein rearrangement of the intermediate thiocarbonylium ion is the key step. The structures of the products 10 and 14, which have rearranged bicyclic systems, have been
在Et 3 N存在下,亚硫酰氯和二硫酰氯与硫樟基(6)的反应分别导致不对称的二硫烷和三硫烷(流程2和4)。提出了通过立即被去质子化的硫代羰基离子的反应机理。Wagner Meerwein重排导致在不存在碱的情况下形成次要产物10,这是硫代羰基离子中间体的另一种证据(方案3)。另一方面,不可烯化的硫代孕酮(13)与亚硫酰氯在CH 2 Cl 2中反应/ Et 3 N仅给出具有重排双环骨架的产品(方案5)。甲WagnerMeerwein中间thiocarbonylium离子的重排是关键的一步。已经通过X射线晶体学确定了具有重排的双环体系的产物10和14的结构。