1. Tetracyclone reacts with dimethyl phosphite in the absence of catalysts at the carbonyl group to form an enol phosphate (O,O′-dimethyl 2, 3, 4, 5-tetraphenyl-1,4-cyclopentadienyl phosphate)and by 1,4- and 1,6-addltion ...

The reaction of 2,5-bis(carbomethoxy)-3,4-diphenylcyclopentadienone with dimethyl phosphite, both in the presence of Et3N and in the absence of catalysts, goes with the formation of the dimethyl esters of 2-oxo-4,5-diphe ...

1. Methyl phenylphosphinate reacts with tetracyclone in the absence of catalysts according to a scheme involving 1,4 and 1,6 addition of the conjugated cyclone system to form methyl 2,3,4,5-tetraphenyl-4-cyclopenten-1-on ...