Wie wir kiirzlich zeigen konnten, reagiert das aus der Carbenquelle 1 generierbare Dimethoxycarben 2 rnit dem Diazadiensystem des Tetrazins 4 in einer Folge von [4+1]-Cycloaddition und anschlieaender N2-Eliminierung in guten Ausb. zum Isopyrazol-4-on-ketal 7l). Vorfeilhafter l a t sich das nucleophi
✦ LIBER ✦
Thermolyse des 2,5-Bis(methylthio)-4,4-diphenyl-4H-imidazols
✍ Scribed by Zauer, Károly ;Zauer-Csüllög, Irén ;Lempert, Károly
- Publisher
- Wiley (John Wiley & Sons)
- Year
- 1973
- Tongue
- English
- Weight
- 608 KB
- Volume
- 106
- Category
- Article
- ISSN
- 0009-2940
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## Abstract The synthesis of 2‐(2,4‐difluorophenyl)‐4,5‐bis(4‐methoxyphenyl)imidazole labelled with carbon‐14 in the 2‐position of the imidazole ring has been achieved in four stages starting from barium [^14^C] carbonate via 2,4‐difluoro‐[__carboxyl__]^14^C benzoic acid and the corresponding aldeh