Substituent effects in the cycloaddition reactions of Reissert hydrofluoroborate salts with alkenes
✍ Scribed by McEwen, William E.; Hernandez, Maria Alcira; Ling, Chei-Fei; Marmugi, Elba; Padronaggio, Regina M.; Zepp, Charles M.; Lubinkowski, Jacek J.
- Book ID
- 127254694
- Publisher
- American Chemical Society
- Year
- 1981
- Tongue
- English
- Weight
- 706 KB
- Volume
- 46
- Category
- Article
- ISSN
- 0022-3263
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📜 SIMILAR VOLUMES
## The reaction of the hydrofluoroborate salt of an open-chain The [3 + 2] cycloadducts 13 evolve via a rearrangementcondensation sequence to give a substituted 2-pyridone analogue of a Reissert compound with some α,β-ethylenic esters does not give a [4 + 2] cycloadduct, as previously derivative 1
## Abstract The 2‐methylenecephalosporins 1 undergo stereoselective 1,3‐dipolar cycloaddition reactions with diazoalkanes to give exclusively the spirocyclopropylcephalosporins 3. Substituens at C‐3, C‐4 and C‐7 of the cephalosporin nucleus do not display a significant effect on the reactivity of t