Diene-transmissive hetero-Diels–Alder reaction of cross-conjugated azatrienes: a novel and efficient method for the synthesis of ring-fused nitrogen heterocycles
Diene-transmissive hetero Diels–Alder reaction of cross-conjugated azatrienes with ketenes: a novel and efficient, stereo-controlled synthetic method for hexahydroquinolinones
dimethylketene at room temperature to afford [2+2] cycloadducts, while the reaction with dichloroketene produced [4+2] cycloadducts. Upon heating, the [2+2] cycloadducts underwent a [1,3] sigmatropic rearrangement giving the formal [4+2] cycloadducts. The second Diels–Alder reaction of the [4+2] mono-adducts with electron-deficient dienophiles such as tetracyanoethylene, N-phenylmaleimide and methyl vinyl
Diene-transmissive hetero-Diels–Alder reaction of cross-conjugated azatrienes: a novel and efficient method for the synthesis of ring-fused nitrogen heterocycles
A diene-transmissive hetero-DielsâAlder reaction of cross-
conjugated azatrienes, which provides a novel and efficient synthetic
method for ring-fused, nitrogen-heterocyclic frameworks such as
quinazolin-2-ones and pyrimido[5,4-c]- pyridazin-6-ones, is
described for the first time.