Hetero-Diels-Alder reactions of N-phosphoryltrihaloacetimidoyl chlorides with 1,3-butadienes
作者:Mykola V. Kolotylo、Oleksii A. Synytsya、Petro P. Onys’ko
DOI:10.3998/ark.5550190.0013.410
日期:——
Hetero-Diels-Alderreactions of N-phosphoryltrihaloacetimidoylchlorides with 1,3-butadienes led to new 2-chloro-2-trihalomethyl substituted tetrahydropyridine adducts. Cycloadducts with CF3 group undergo thermal or acid catalyzed dehydrochlorination affording respective dihydropyridines and subsequent aromatization to form 2-trifluoromethylpyridines. Trichloromethyl analogs under similar conditions