Photochemical Synthesis of 2-Alkylidene-1,3-cycloalkanediones

DOI: 10.1002/hlca.19870700410

Source and publish data:

Helvetica Chimica Acta p. 995 - 996 (1987)

Update date:2022-08-05

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Authors:

Hobel, Klaus

Margaretha, Paul

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Article abstract of DOI:10.1002/hlca.19870700410

Photolysis (λ=254 nm) of 4-(tert-butyl)-4,6,7,8-tetrahydro-7,7-dimethyl-2H-1-benzopyran-2,5(3H)-dione (3a) in t-BuOH affords 2-(2,2-dimethylpropylidene)-5,5-dimethyl-1,3-cyclohexanedione (1a) in 80percent yield via homolysis of the lactone O-CO bond and subsequent ketene elimination.

Full text of DOI:10.1002/hlca.19870700410

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