Pyridinium ylides derived from pyryliums and amines and a novel rearrangement of 1-vinyl-1,2-dihydropyridines
β Scribed by Katritzky, Alan R.; Chermprapai, Amornsri; Patel, Ranjan C.; Tarraga-Tomas, Alberto
- Book ID
- 121015800
- Publisher
- American Chemical Society
- Year
- 1982
- Tongue
- English
- Weight
- 789 KB
- Volume
- 47
- Category
- Article
- ISSN
- 0022-3263
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## Abstract An efficient synthetic method was developed for the construction of substituted 1,2βdihydropyridines by goldβcatalyzed tandem reactions. The key intermediates 2,4βdienals were generated from propargyl vinyl ethers or allenic vinyl ethers with gold catalysts. These two reactions involved
## Abstract New pyrrolo[2,1β__a__]isoquinolines were obtained by two oneβpot procedures via 1,3βdipolar cycloaddition between the isoquinolinium Nβylides and symmetrical acetylenic dipolarophiles, avoiding the formation of dihydro intermediates. For structural comparison, the dihydro derivatives ob