Stereoselective Cyclizations and Rearrangements in Vinyl Radicals Promoted by Regioselective Sulfanyl Radical Addition to Enynes
โ Scribed by Montevecchi, Pier Carlo; Navacchia, Maria Luisa
- Book ID
- 127278697
- Publisher
- American Chemical Society
- Year
- 1997
- Tongue
- English
- Weight
- 428 KB
- Volume
- 62
- Category
- Article
- ISSN
- 0022-3263
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๐ SIMILAR VOLUMES
Thermal radical reactions of azidoalkynes 2, 8, 14, and 21ac with thiols 1a-c afford 2-sulfanylvinyl radicals by selective addition of sulfanyl radicals to the triple bond. 1-Phenylvinyl radicals 23 and 30a, as well as vinyl radical 30b, undergo fast 5-cyclization onto the aromatic azide function to
## Abstract The 4โsubstituted 1โphenylโ1โbuteneโ3โynes 1aโc and the 2โethynylstyrenes 7aโc were subjected to highโtemperature pyrolysis. The cycloisomerization products isolated suggest that these are formed by three competing processes: by (i) an electrocyclic or a moleculeโinduced, (ii) an alkeny