77488-40-5

Upstream product

• 30762-59-5 2-bromo-3,4-bis(diphenylmethylene)cyclobutanone 
• 603-35-0 triphenylphosphine 

Downstream Products

• 77488-42-7 C₄₈H₃₅OP 
• 77488-48-3 2-Benzhydrylidene-3-phenyl-8-phenylamino-2H-cyclobuta[b]naphthalen-1-one 
• 77498-83-0 2-Benzhydrylidene-8-methyl-3-phenyl-2H-cyclobuta[b]naphthalen-1-one 
• 77488-41-6 (2-hydroxy-5,8,8-triphenylbenzoheptafulvenyl)triphenylphosphonium bromide 
• 73173-03-2 (3,4-bis(diphenylmethylene)2-oxocyclobutyl)triphenylphosphorane 

Relevant academic research and scientific papers

NEW ROUTES TO 5,8,8-TRIPHENYLBENZOHEPTAFULVENES FROM (3,4-BIS(DIPHENYLMETHYLENE)-2-OXOCYCLOBUTYLIDENE)TRIPHENYLPHOSPHORANE. ISOLATION OF EXCESSIVELY STABILIZED BETAINE.

Thermal isomerization of HBr salt of the title phosphorane gave (2-hydroxy-5,8,8-triphenylbenzoheptafulvenyl)triphenylphophonium bromide, which upon dehydrobromination afforded excessively stabilized betaine.Thermal reaction of the title phosphorane with diphenylketene gave 5,8,8-triphenyl-benzoheptafulvene which is condensed with cyclopropane ring.