Shoji Kajigaeshi

Phosphorescence spectra of polycyclic compounds—I: Fluorene and dibenzofuran

Abstract Phosphorescence spectra of fluorene and dibenzofuran have been studied in cyclohexane at 90°K. The spectra have appeared sharp, and commercial fluorene has proved to contain dibenzofuran as an impurity since the first band group of the spectrum of commercial fluorene coincided with that of dibenzofuran. Vibrational analyses of synthetic fluorene and purified commercial dibenzofuran have been discussed. A possibility for the quantitative analysis of dibenzofuran in fluorene has also been studied.

Halogenation using quaternary ammonium polyhalides. Part 22. Selective bromination of aromatic ethers with benzyltrimethylammonium tribromide

The reaction of aromatic ethers with a stoicheiometric amount of benzyltrimethylammonium tribromide in dichloromethane–methanol or acetic acid–ZnCl2 under mild conditions gave, selectively, mono-, di-, or tri-bromo-substituted aromatic ethers in quantitative yields.

Preparation of Cyclopropa[4,5]pyrido[2,3-d]- and Pyrrolo[2,3-d]pyrimidine Derivatioves Using Intramolecular Carbene Reactions

Some cyclopropa[4,5]pyrido[2,3-d]pyrimidine and pyrrolo[2,3-d]pyrimidine derivatives were obtained from the intramolecular carbene reactions of the pyrimidine system

Isolation of azirino[1,2-a]indole derivatives by the thermolysis of 2-alkenyl-3-azido-2-cyclohexen-1-ones

The thermal reaction of 2-alkenyl-3-azido-2-cyclohexen-1-ones in toluene gave azirino[1,2-a]indole derivatives as major products together with indoles

Synthesis and properties of 6H-benzo[hi]pyrrolo[2,1,5-cd]indolizin-6-ones

The electronic features and chemical behaviors of 3-phenyl-6H-benzo [hi] pyrrolo [2,1,5-cd] indolizin-6-one were discussed comparing with those of 4-one regio-isomer, 3-phenyl-4H-benzo [hi] pyrrolo [2,1,5-cd]-indolizin-4-one

Facile synthesis of N-bromoamides using benzyltrimethylammonium tribromide in alkaline solution

Aliphatic and aromatic amides reacted with a stoicheiometric amount of benzyltrimethylammonium tribromide in ice-cold aqueous sodium hydroxide to give N-bromoamides in good yields.