作者:Shang-Shing P. Chou、Pi-Wei Liang
DOI:10.1002/jccs.200000009
日期:2000.2
the cyclized products 4-9 in good yields. The regiochemistry was found to be dominated by the phenylsulfinyl group, but could be reversed by the presence of a Lewis acid. Deprotonation of 2 by BuLi, followed by the reaction with alkyl halides, gave the substituted 2-sulfolenes 10. A synthetic application of 10 was demonstrated by converting 10e to the bicyclic product 11.
标题化合物 2 很容易通过硫化物 1 的 MCPBA 氧化来制备。2 的热脱磺酰化得到亚砜取代的二烯 3。3 与各种亲二烯体的 Diels-Alder 反应以良好的收率得到环化产物 4-9。发现区域化学以苯亚磺酰基为主,但可能会因路易斯酸的存在而逆转。BuLi 对 2 进行去质子化,然后与卤代烷反应,得到取代的 2-环丁砜 10。通过将 10e 转化为双环产物 11,证明了 10 的合成应用。