Studies on Cycloaddition Reactions of Vinylphosphonates with Nitrones.
β Scribed by Yong Ye; Ling-Yun Li; Li Tian; Lun-Zu Liu
- Publisher
- John Wiley and Sons
- Year
- 2005
- Weight
- 18 KB
- Volume
- 36
- Category
- Article
- ISSN
- 0931-7597
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The intramolecular 1,3-dipolar cycloaddition of Ο-unmolecular cycloaddition, followed by reductive opening of the isoxazolidine ring, produced five-and seven-membered saturated chiral nitrones is described. Starting materials for this reaction are O-protected chiral cyanohydrins, prepared ring compo
## Abstract The mechanisms of cycloaddition reactions between 2βazaallene cations and isocyanates have been explored at the B3LYP/6β31G\* level. It is found that [2+2] or [2+4] cycloaddition reactions can take place via an intermediate when 2βazaallene cations react with 1 or 2 equiv. of isocyanate