68913-17-7Relevant articles and documents
Pyridine ring formation through the photoreaction of arenecarbothioamides with diene-conjugated carbonyl compounds
Oda, Kazuaki,Nakagami, Rikiji,Nishizono, Naozumi,Machida, Minoru
, p. 2371 - 2372 (2007/10/03)
Irradiation of arenecarbothioamides with hexa-2,4-dienal in benzene solution gives 2-arylpyridines in moderate yields.
Preparation of Benzocyclobutenones via the Photochemical Cyclization of 1-(ortho-Alkylary)-2,2,4-trimethylpentane-1,3-diones
Yoshioka, Michikazu,Momose, Shinobu,Nishizawa, Kaori,Hasegawa, Tadashi
, p. 499 - 503 (2007/10/02)
Irradiation of 1-(ortho-methylaryl)- and 1-(ortho-ethylaryl)-2,2,4-trimethylpentane-1,3-diones 4a-g in hexane gave benzocyclobutenols 10a-g.However, irradiation of 1-(ortho-isopropylaryl)-2,2,4-trimethylpentane-1,3-diones 4i and 4j resulted in no reaction.Irradiation of 1-mesityl-2,2,4-trimethylpentane-1,3-dione 4h gave a complex mixture of products.Pyrolysis of benzocyclobutenols 10a, b, d-f gave benzocyclobutenones 11a, b, d-f and 2,4-dimethylpentan-3-one 2, whereas that of the benzocyclobutenols 10c, g gave the starting 1,3-diketones 4c, g predominantly along with small amounts of benzocyclobutenones 11c, g and the dimethylpentanone 2.
Photochemical Reaction of o-Alkylphenyl 1,3-Diketones. A New Method for the Preparation of Benzocyclobutenones
Yoshioka, Michikazu,Arai, Masayuki,Nishizawa, Kaori,Hasegawa, Tadashi
, p. 374 - 375 (2007/10/02)
Irradiation of o-alkylphenyl 1,3-diketones (1) in hexane gave benzocyclobutenols (2) which underwent thermal retro-aldol cleavage to yield benzocyclobutenones (3).