A new ring transformation: Synthesis of 5,5-dimethyl-3-oxo-1-pyrroline 1-oxides from 6,6-dimethyl-4-oxo-5,6-dihydro-1,2,4h-oxazines
作者:Christian Deshayes、Suzanne Gelin
DOI:10.1016/s0040-4039(01)90519-2
日期:1981.1
The nitrosation of some γ,δ-unsaturated β-diketo compounds affords the 3-substituted 4-oxo-5,6-dihydro-1,2,4H-oxazines. These compounds are converted to the isomeric 3-oxo-1-pyrroline 1-oxides by a facile thermal rearrangement.
一些γ,δ-不饱和β-二酮化合物的亚硝化提供了3-取代的4-氧代-5,6-二氢-1,2-,4H-恶嗪。通过容易的热重排将这些化合物转化为异构体3-氧代-1-吡咯啉1-氧化物。