A Short and Convenient Synthesis of Novel Thienopyrazolodiazepine and Thienopyrazoloxazepine Skeletons via Nitrilimine Cycloaddition
作者:Giorgio Molteni、Paola Del Buttero
DOI:10.3987/com-10-11905
日期:——
generation of the corresponding nitrilimine (4) which constitute the key intermediate in the three step synthesis of both thieno[2,3-f]pyrazolo[1,5-a][1,4]diazepine and thieno[2,3-Apyrazolo[1,5-a][1,4]- oxazepine skeletons. The concurrent formation of unusual pyridazine derivatives arising from the electrophilic attack of a nitrilium cation to the carbon-carbon double bond is also discussed in some