Dedicated to Meinhart H. Zenk on the occasion of his 70th birthday -Thiocarbonyl ylide× 2B is accessible from 1,1,3,3-tetramethylindanthione and CH 2 N 2 , and subsequent N 2 extrusion at 40 ± 508. In situ cycloaddition of the sterically hindered 2B with 2,3-bis(trifluoromethyl)fumaronitrile ((E)-3)
✦ LIBER ✦
Reactions of Sterically Hindered ‘Thiocarbonyl Ylides' with 1,2-Bis(trifluoromethyl)ethene-1,2-dicarbonitrile: Isolation of a Cyclic Seven-Membered Ketene Imine
✍ Scribed by Rolf Huisgen; Grzegorz Mlostoń; Elke Langhals; Takumi Oshima
- Publisher
- John Wiley and Sons
- Year
- 2002
- Tongue
- German
- Weight
- 201 KB
- Volume
- 85
- Category
- Article
- ISSN
- 0018-019X
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The reaction of 1,4,5-trisubstituted 1H-imidazole-3-oxides 1 with 2,2-bis(trifluoromethyl)ethene-1,1dicarbonitrile (7, BTF) yielded the corresponding 1,3-dihydro-2H-imidazol-2-ones 10 and 2-(1,3-dihydro-2H-imidazol-2-ylidene)malononitriles 11, respectively, depending on the solvent used. In one exam