Synthesis of spiro-pyrazolines: reaction of 1,3-diphenylnitrilimine with fulvenes
作者:D.N. Dhar、R. Ragunathan
DOI:10.1016/s0040-4020(01)91808-3
日期:1984.1
A one-step synthesis of a new series of spiro-pyrazolines has been accomplished by the 1,3-dipolar cycloaddition of 1,3-diphenylnitrilimine with various fulvenes (2,3,4,5-tetraphenyl fulvene (1) and its analogues (2, 3), 9-benzalfluorene (7) and its analogues (8, 9) and 6,6-diphenylfluvene (13)). With the exception of 13 all other fulvenes undergo 1,3-dipolar cycloaddition across the exocyclic double
一个新的螺吡唑啉系列化合物的一步合成已通过1,3-二苯基硝苯胺与各种富勒烯(2,3,4,5-四苯基富勒烯(1)及其类似物的1,3-偶极环加成反应完成(2,3),9- benzalfluorene(7)和其类似物(8,9)和6,6- diphenylfluvene(13))。的除外13所有其他富烯进行1,3-偶极环加成横跨环外双键,得到迄今未报告的螺吡唑啉衍生物(1-6,10-12)。在13的情况下然而,1,3-偶极的添加发生在环内双键的位点,导致吡唑啉衍生物的形成(14)。