Reaction of sodium cyanide with 2H-pyran-2-thiones and their 3-bromo derivatives
✍ Scribed by Morcos Michael Mishrikey
- Book ID
- 112127019
- Publisher
- Journal of Heterocyclic Chemistry
- Year
- 1983
- Tongue
- English
- Weight
- 96 KB
- Volume
- 20
- Category
- Article
- ISSN
- 0022-152X
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📜 SIMILAR VOLUMES
Reaction of pyran-2-thiones 4 with nitroso derivatives led surprisingly to type-8 (19) adducts which proved to be isomeric with the initially expected primary Diels-Alder cycloadducts 5. Methyl 2-thioxo-2H-pyran-5-carboxylate (40, when reacted with nitrosobenzene at -lo", led quantitatively to the t
## Abstract magnified image __N__‐Aryl‐4‐hydroxy‐6‐methyl‐2__H__‐pyran‐2‐one‐3‐carbothiamides and __N__‐aryl‐4‐hydroxycoumarin‐3‐carbothiamides were synthesized by the reaction of arylisothiocyanates with 4‐hydroxy‐6‐methylpyran‐2‐one and 4‐hydroxycoumarin, respectively. Novel products 3‐[bis(aryl
## Abstract Cycloadditions of the α,β‐unsaturated‐acyl cyanides 1–3 with (__Z__)‐or (__E__)‐1‐bromo‐2‐ethoxyethene (4) may be performed at moderate temperatures and provide in good yields the 3‐bromo‐2‐ethoxy‐3,4‐dihydro‐2__H__‐pyran‐6‐carbonitriles 5–7, respectively (__Scheme 1__). Diastereoisomer