## Abstract The synthesis of phenathrenes substituted by nitrogen and oxygen atoms in position 9 and 10 by photolysis of 4,5‐diphenyl‐oxazol‐2‐ones (cf. __Scheme 4__) is described. Moreover an improved general procedure for the synthesis of benzoins in aprotic solvent (tetra‐__t__‐butylammonium cya
Synthesis of phenanthro[9, 10-d]oxazoles from 10-(methoxyimino)phenanthrene-9-one
✍ Scribed by Demetrios N. Nicolaides; Evangelia A. Varella; R. Wajih Awad
- Publisher
- Elsevier Science
- Year
- 1993
- Tongue
- French
- Weight
- 524 KB
- Volume
- 49
- Category
- Article
- ISSN
- 0040-4020
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## Abstract Treatment of phenanthrene‐9,10‐dione (PQ) with phenanthrene‐9,10‐diol (PQH~2~), as prepared by catalytic hydrogenation of PQ, in toluene solution or in the solid state afforded crystalline ‘9,10‐phenanthrenequinhydrone’ (PQH), the first example of an __ortho__‐quinhydrone. PQH was chara
## Abstract The reaction of the potassium salt of phenanthro[9,10‐__d__]triazole and benzyl chloride gave 2‐(benzyl)‐2__H__‐phenanthro[9,10‐__d__]triazole (2a) in 15% yield. The other regio‐isomer, 1‐(benzyl)‐1__H__‐phenanthro[9,10‐__d__]‐triazole (1a), was obtained as a by‐product in 3.9% yield. S