作者:Matthias D'hooghe、Tim Vanlangendonck、Karl W. Törnroos、Norbert De Kimpe
DOI:10.1021/jo060313y
日期:2006.6.1
using bromine in dichloromethane. The latter morpholine has been used as a substrate for the synthesis of the corresponding 3,5-di(methoxymethyl)morpholine and 3,5-di(cyanomethyl)morpholine upon nucleophilic displacement of both bromo atoms. Further evaluation of this protocol toward the synthesis of 4-arylmethyl- and 4-alkylmethyl-3,5-di(bromomethyl)morpholines showed that the premised cyclization of the
1-叔丁基-2-(烯丙氧基甲基)氮丙啶已首次使用苯在二氯甲烷中的亲电试剂诱导的闭环反应非对映选择性地转化为顺式-3,5-二(溴甲基)-4-叔丁基吗啉。后者的吗啉已被用作在两个溴原子亲核取代后合成相应的3,5-二(甲氧基甲基)吗啉和3,5-二(氰基甲基)吗啉的底物。对该协议对4-芳基甲基和4-烷基甲基-3,5-二(溴甲基)吗啉的合成的进一步评估表明,将相应的2-(烯丙氧基甲基)氮丙啶以3,5-二(溴甲基)为前提的环化反应吗啉仅在N上进行良好-新戊基吗啉,随后将其转化为3-氧杂-7-硫杂-9-氮杂双环[3.3.1]壬烷衍生物。同样,在某些其他情况下,所需的3,5-二(溴甲基)吗啉以低收率分离并转化为相应的3,5-二(氰甲基)吗啉。