[2 + 2]-Photocycloaddition of 1,1-Diethoxyethylene to Chiral Polyfunctional 2-Cyclohexenones. Regioselectivity and π-Facial Discrimination
✍ Scribed by García-Expósito, Elena; Álvarez-Larena, Ángel; Branchadell, Vicenç; Ortuño, Rosa M.
- Book ID
- 126093429
- Publisher
- American Chemical Society
- Year
- 2004
- Tongue
- English
- Weight
- 143 KB
- Volume
- 69
- Category
- Article
- ISSN
- 0022-3263
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Irradiation of benzene solutions containing pyrene and electron-de®cient arylalkenes such as E-and Zmethyl cinnamates aorded (2p+2p) photocycloadducts including 1:2-cycloadduct in high yields in a stereospeci®c and endo-selective manner. Sandwich-type singlet exciplexes between pyrene and arylalkene
## SummarV : The conformational profiles for rotation around the C-C(=O) bond a and the energy minimum conformations are calculated for propionaldehyde 1, chloroacetaldehyde 2, MP2/6-3lG(d)//HF/6\_3lG(d). and 2-chloropropionaldehyde 3 at a function of a for 1, 2, The energy level of the LUMO is ca