78482-08-3Relevant articles and documents
Generation and Thermal Reactions of 2-Methyl-4-oxo-2-selenoniochroman-3-ide
Hori, Mikio,Kataoka, Tadashi,Shimizu, Hiroshi,Tsutsumi, Kazuhiro
, p. 1397 - 1400 (2007/10/02)
The thermal reaction of 2-methyl-4-oxo-2-selenoniochroman-3-ide (4) in aprotic solvents afforded (E)-bisbenzoyl>ethylene (5) and trans-1,2,3-trisbenzoyl>cyclopropane (6) via a carbene intermediate.Ethanol reacted thermally with 4 to open the chroman ring, giving ethyl 2-benzoate (9a) and ethyl 2-(ethoxymethyl)benzoate (10a), whereas reaction with methanol yielded only methyl 2-benzoate (9b).Hydrolysis of ylide 4 eliminated dimethyl selenide, giving phthalide and 2-(hydroxymethyl)benzoic acid.
New Synthesis of Chalcogenolactones. 1H,3H-Benzoselenophen-1-one, 1H,3H-Benzotellurophen-1-one and the Related 3,4-Dihydro-1H-2-benzoselenin-1-one and 3,4-Dihydro-1H-2-benzotellurin-1-one
Loth-Compere, M.,Luxen, A.,Thibaut, Ph.,Christiaens, L.,Guillaume, M.,Renson, M.
, p. 343 - 345 (2007/10/02)
The synthesis of three new basic heterocyclic systems namely, 1H,3H-benzotellurophen-1-one (2-tellurophthalide), 3,4-dihydro-1H-2-benzoselenin-1-one (3,4-dihydro-2-isoselenocoumarin) and 3,4-dihydro-1H-2-benzotellurin-1-one (3,4-dihydro-2-isotellurocoumarin), is reported through the cyclisation of o-(bromoalkyl)benzoyl chlorides.
