Diels-alder reactions of azodiphosphonic acid, tetraphenyl ester
β Scribed by John L. Miesel
- Publisher
- Elsevier Science
- Year
- 1974
- Tongue
- French
- Weight
- 161 KB
- Volume
- 15
- Category
- Article
- ISSN
- 0040-4039
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π SIMILAR VOLUMES
Diels-Alder reaction of dienyl ff-methacrylthioimidates has been investigated under thermal or Lewis acid or protonic acid catalyzed conditions. The utility of the reaction is shown by desulfurative ring contraction of bicycle L4.4.0 1 to bicycle [ 4.3.0 I system.
Intramolecular cyclisation of acyclic triene esters derived from dichloromaleic anhydride affords bicyclic lactones, which by dechlorodecarboxylation, dechlorination or dehydrochlorination are readily elaborated to give novel unsaturated lactones.
6-Vinylpurines readily undergo Diels-Alder reactions with dienes. Both reactivity and endo selectivity are greatly improved when the cycloadditions are performed in the presence of zinc chloride. Lewis acid mediated Diels-Alder reaction of 6-vinylpurine riboside was employed as a key step in the syn