Synthesis of imidazo [4.5-c] pyridine and imidazo [4,5-d][1,2] diazepine systems and their ribonucleosides
作者:Andrej Frankowski
DOI:10.1016/s0040-4020(01)87371-3
日期:1986.1
N-iminopyridinium ylide was obtained. In photochemical reaction gives the isomeric 1,2-diazopines and , of the ratio dependent of the solvent used. The monocyclic diazepine undergoes recyclination to the imidazo[4,5-d][1,2]diazepine derivative . N-Ribosidation of leads via O-benzoylated nucleosides and to two monoribonucleosides and . N-Ribosidation of the fused diazepine gives three O-benzoilated nucleosides:
稠合的N- iminopyridinium叶立德紫外线照射和,从咪唑并制备并[4,5-c]吡啶(),导致区域专一形成4-氨基咪唑并[4,5-c]吡啶衍生物的和分别。稠合的N- iminopyridinium叶立德,其可以由1-苄基-1,3-二氢咪唑并[4,5-c]吡啶-2-酮(获得),经过光敏反应tranaformation到isomoric氨基吡啶衍生物和。相反,从1,3-二氢咪唑并[4,5-c]吡啶-2-酮()开始,获得了单环N-亚氨基吡啶鎓叶立德。在光化学反应给出异构1,2- diazopines和,其比例取决于所用溶剂。单环二氮杂pine经历环化反应成咪唑并[4,5-d] [1,2]二氮杂derivative衍生物。N个-Ribosidation由邻苯甲酰核苷引线和两个monoribonucleosides和。稠合的二氮杂的N-核糖基化得到三个O-苯甲酰化的核苷:单核糖苷和Diriboside