Generation of cyclohexyne and its Diels-Alder reaction with α-pyrones
✍ Scribed by Nieves Atanes; Sonia Escudero; Dolores Pérez; Enrique Guitián; Luis Castedo
- Publisher
- Elsevier Science
- Year
- 1998
- Tongue
- French
- Weight
- 105 KB
- Volume
- 39
- Category
- Article
- ISSN
- 0040-4039
No coin nor oath required. For personal study only.
✦ Synopsis
Cyclohexyne, which was generated from 2-(trimethylsilyl)cyclohexenyttriflate by fluoridepromoted ~elimination, reacts with ct-pyrones to afford the corresponding tetrahydronaphthalenes.
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Ab5tract: 4-Ethyl-5-methyl-6-mthylthio-2(H)-pyranone (4) undergoes Dials-Alder reactions with ethyl hexynoate (5). 3-heptyn-2-one (6). ethyl ptopiolate (7). and3-butyn-2-one (8) to afford substituted banzenes with high ragioselectivity upon extrusion of CO2. 4-Ethyl-5.6-dimethyl-( 4-ethyl-3,6-dimeth
## Abstract New linear polyimides 11 were synthesized via Diels‐Alder addition polymerization of α‐pyrones 9 with bismaleimides 10. The number‐average molecular weights __M__~n~ range from 10 000 to 34 000 g. mol (gel‐permeation chromatography). The chemical structure of these polymers is supported