107798-24-3Relevant academic research and scientific papers
Reactions of Azines. 12. Preparation and Reactions of Triphenylphosphonium Bromide
Schweizer, E. E.,Hayes, J. E.,Rheingold, A.,Wei, Xu
, p. 1810 - 1816 (2007/10/02)
Preparation of triphenylphosphonium bromide (13), triphenylphosphonium iodide (15), and their corresponding ylides 14 and 16 was accomplished.The reaction of 14 with diphenylketene gave 2-methyl-4,9-diphenyl-9-(methoxycarbonyl)-4,9-dihydropyrazoloisoquinoline (19/20).The reaction of 16 with phenyl isocyanate gave 6,7-dimethyl-3-methoxy-1,3-diphenyl-1H-imidazopyrazol-2(3H)-one (27b), 2,3-dimethyl-9-(methoxycarbonyl)-9-phenyl-4,9-dihydropyrazoloquinazoline (30), and 2,3-dimethyl-9-phenylpyrazoloquinazoline (31).Phenylacetoxyketene, on reacting with triphenylphosphorane (35), gave 2-methyl-4,9-diphenylpyrazoloisoquinoline (40).Carbon disulfide with ylide 16 gave the 2,3-dimethyl-9-(methoxycarbonyl)-9H-pyrazolobenzothiazine (45) and desaurine (42) as well as the trans-5,10-bis(methoxycarbonyl)-5,10-diphenyldipyrazolodiazadithiocine (46).Confirmation of the structures 31, 42, and 46 was obtained by crystallographic analyses.
