Structural direction of the heterodiene synthesis in the reaction of oxazoles with acetylenic dienophiles
β Scribed by L. B. Medvedskaya; M. G. Makarov; G. Ya. Kondrat'eva
- Book ID
- 112439919
- Publisher
- Springer
- Year
- 1973
- Tongue
- English
- Weight
- 325 KB
- Volume
- 22
- Category
- Article
- ISSN
- 1573-9171
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π SIMILAR VOLUMES
1,2-Dihydro-1,3,2-diazaphosphinine 2 reacts with acetylene-dimethyl acetylenedicarboxylate. A reaction pathway is proposed based primarily on i) the isolation and characterization dicarboxylic acid esters to give chemoselectively the adducts 5 or 6a, b, depending on the reaction conditions. Compound
Ynnmine esters undergo regioselective formal hetero-Diels-Alder reactions with a$-unsaturated-1,3-dicarbonyl compounds yielding functionalised pyrans. The chemoselectivity of the reaction appears to be governed by sten'c factors.