Diphenylcyclopropenone, condensation with

In addition, diphenylcyclopropenone condensed with 3-methylindole in the 2-position to yield 36 and with 2-phenyl-7-methylindolizine to yield 37. Similarly, cycloheptenocyclopropenone reacted with 2-phenylindole, leading to 38. Attempts to generate the free bases by treatment of the salts with a variety of bases of low nucleophilicity produced, at best, only fleeting colors attributable to the deprotonated species. The authors suggest that an ionic polymerization takes place due to the dipolar character of the free azapentatriafulvalenes. This hypothesis has been supported by the observation that the azafulvalenium salts were regenerated from the polymeric material by protonation in strongly acidic solution (Scheme 11). 

Chloro-a,/3-unsaturated aldehydes condense with ammonium thiocyanate to give isothiazoles (76EGP122249). 2,3-Diphenylcyclopropenone reacts with iV-sulfinyl-cyclohexylamine in the presence of nickel tetracarbonyl to give the isothiazolin-3-one 1-oxide (197) (79SST(5)345). Cholesteryl acetate reacts with trithiazyl trichloride in pyridine to give the isothiazolo steroid (198) (77JCS(P1)916). 

Diphenylcyclopropenone, 47, 62 Dii henyldiacetylene, 45, 39 Diphenyl disulfide, oxidation to methyl benzenesulfinate, 46, 62 1,1-Diphenylethylene, reaction with N,or diphenylmtrone, 46,129 N,N -Diphi iiyli tiiyleni diamine, condensation with triethyl orthoformate, 47, 14... 

Miscellanous Cycloadditions. The ylide (23a R = H or Me Y = SOjMe or PPhj) condenses with diphenylcyclopropenone to give a tetralone (723) and the ylide derived from (724) affords the a-pyrone (725). ... 

Various 3,5-disubstituted-2-pyridylpyrroles 11 were synthesized employing condensation of 2-(aminomethyl)pyridine (12) and suitable 1,3-dicarbonyl compounds 13 <02OL435>. The reaction of diimines with diphenylcyclopropenone has been reported to give various 4,5-diphenylpyrrol-3-ones in moderate yields <02JCS(P1)341>. 

A catalytic amount of )3-alaaine significantly improves the yields in the condensation of diphenylcyclopropenone with malononitrile and ethyl cyanoacetate. ... 

A solution of2,3-diphenylcyclopropenone(5.26 g, 25 mmol) andNHjOH HCI (5.30 g, 76 mmol) in McOH (30 niL) was allowed to stand at rt for 1 d. The precipitated salt was collected and washed with a small amount of cold MeOH and dried under reduced pressure. The salt was treated with aq NaHCO, and extracted with CHjClj. The extract was dried (NajCOj), condensed in vacuo, and recrystallized (MeOH) to give yellow needles yield 5.41 g (98%) mp 133 136°C. 

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