Masato Hasebe

Photochemical arylation by oxime esters in benzene and pyridine: simple synthesis of biaryl compounds

Abstract Irradiation of benzophenone O-arenecarbonyloximes in benzene and pyridine affords the corresponding arylbenzenes and arylpyridines, respectively, in high yields.

Photochemical generation of aliphatic radicals from benzophenone oxime esters: simple synthesis of alkylbenzenes and alkylpyridines

Abstract Photolysis of benzophenone oxime esters, prepared with aliphatic carboxylic acids and benzophenone oxime, in benzene and pyridine generates various primary, secondary and tertiary aliphatic radicals selectively, and corresponding alkylbenzenes and alkylpyridines are produced in good yields, respectively.

Photoreductive decarboxylation of carboxylic acids via their benzophenone oxime esters

Abstract Decarboxylation of various carboxylic acids, including ∝β- andamino acids, is performed by the photolysis of their benzophenoneoxime esters in isopropanol in the presence of t-butyl mercaptane,and corresponding decarboxylated products are obtained in goodyields under mild photolytic conditions.

Photodecarboxylative chlorination of carboxylic acids via their benzophenone oxime esters

Abstract Decarboxylative chlorination of various aromatic and aliphatic carboxylic acids is performed successfully by the photolysis of their benzophenone oxime esters in carbon tetrachloride and corresponding chloro compounds are prepared in good yields. High selective generation of the certain radical and efficiency of the stable radical precursor, benzophenone oxime ester, afford much advantage for radical chemistry.

3-Azatricyclo[4.1.0.02,5]heptanes: synthons for novel monocyclic 1,4-dihetero seven-membered ring compounds

Heating the 3-azatricyclo[4.1.0.02,5]heptanes (2) prepared from pyridine via 2-azabicyclo[2.2.0]hex-5-enes (1) results in ring opening to give the corresponding 1,4-dihetero seven-membered ring compounds (3).