Singlet oxygen reactions of 1,3-isoquinolinediones la-le could be sensitized by the anionic sensitizer Rose Bengal (RB) in methanol or by retraphenylporphin (TPP) in the presence of pyridine as a base and a cosolvent in benzene. The products are the corresponding 1,3,4-isoquinolinetriones Za-2e and
Photooxygenation of 1,3-Dienes
β Scribed by Waldemar Adam; Sara Bosio; Anna Bartoschek; Axel G. Griesbeck
- Publisher
- John Wiley and Sons
- Year
- 2004
- Weight
- 49 KB
- Volume
- 35
- Category
- Article
- ISSN
- 0931-7597
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π SIMILAR VOLUMES
Nitrotrifluoroacetate adducts, obtained from 1,3-dienes by reaction with ammonium nitrate in trifluoroacetic anhydride, readily eliminate to afford l-nitro-1,3-dienes in high yield.
A one-pot procedure for the transformation of a 1,3-diene into the corresponding 2-(phenylsulfonyl)-1,3-diene was developed. The reaction involves a 1,2-selenosulfonation-oxidation sequence. 2-( Phenylsulfonyl)-1,3-dienes have recently been shown to be versatile synthons in organic transformations.
The first equilibration of l-methoxycyclohexa-1.4-dienes, readily available from metalassmnia reduction of anisoles. 1 with the more stable cyclohexa-1,3-dienes, was with potassamide in -nia.l This, and other basic reagents in DHSO. have experimental disadvantages.