Carbon black-supported sulfuric acid or BF 3 โ Et 2 O-initiated polymerizations of 2-methylene-4,4,5,5-tetramethyl-1,3-dioxolane (1), 2-methylene-4-phenyl-1,3-dioxolane (2), and 2-methylene-4-isopropyl-5,5-dimethyl-1,3-dioxane (3) were performed. 1,2-Vinyl addition homopolymers of 1-3 were produced u
Photosensitized electron transfer oxidation of 2-substituted 1,3-dithiolane to 1,3-dithiolane-1-oxide
โ Scribed by Bipin Pandey; Smita Y. Bal; Uday R. Khire
- Book ID
- 104229461
- Publisher
- Elsevier Science
- Year
- 1989
- Tongue
- French
- Weight
- 162 KB
- Volume
- 30
- Category
- Article
- ISSN
- 0040-4039
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โฆ Synopsis
Irradiation of a solution of 1,3-dithiolane, I-cyanonaphthalene in 02-saturated CH3CN:H20 350 nm furnishes good yields of 1,3-dithiolane-l-oxide.
1,3-Dithiolanes constitute an important functional group in organic chemistry. However, its photochemistry remains underexplored. Eaton et al. 2 observed that the photolysis of 1,3-dithiolanes, in the absence of oxygen, led to product(s) by initial C-S bond cleavage, whereas Takahasi et al. 3 reported a unique photo-dethioketalization of various 1,3-dithiolanes in the presence of triplet sensitizers and molecular oxygen. Foote et al. the H-NMR, IR, GC, TLC of authentic samples. 11. P.S. Mariano in "Synthetic Organic Photochemistry",
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## Reactions of 2-aryl-l,3-dithiolane-S-oxides 1 with MeMgI in refluxing benzene-ether furnish a useful procedure for introducing the isopropenyl group. The reaction may proceed via a fragmentation-coupling process leading to the alkylative olefination product.