Lithiated Azafulvenes by Halogen/Metal Interchange of Brominated 6-(Diisopropylamino)-1-azafulvene Derivatives. Novel synthesis of 5-mono- and 4,5-disubstituted 1H-pyrrole-2-carbaldehydes
作者:Brian L. Bray、Petr Hess、Joseph M. Muchowski、Markus E. Scheller
DOI:10.1002/hlca.19880710823
日期:1988.12.14
The first known lithiated 1-azafulvene derivatives were generated by low-temperature halogen/metal interchange, with t-BuLi, from the corresponding brominated 6-diisopropylamino compounds 3b and 12. These Li species reacted with sundry eletrophilic reagents to give products which, on basic hydrolysis, were converted into 5-mono- or 4,5-disubstituted pyrrole-2-carbaldehydes 10 and 16, respectively.
通过低温卤素/金属与t -BuLi的交换,从相应的溴化6-二异丙基氨基化合物3b和12生成了第一个已知的锂化1-氮杂富烯衍生物。这些Li物种与各种电子亲和试剂反应,生成的产品经碱性水解后分别转化为5-单-或4,5-二取代的吡咯-2-甲醛10和16。