Structure de la cis-dihydroxy-4,5 diphényl-3,4 méthyl-5 isoxazoline-2

The structure of cis 4,5-dihydroxy-3,4-diphenyl-5-methyl-2-isoxazoline has been determined from the X ray crystallographic analysis. The results show the non-planarity of the isoxazoline ring and the presence of intra- and intermolecular hydrogen bonding.     

Hétérocycles contenant du phosphore. XXIV—Etude par RMN du proton de l'oxo-2 phénoxy-2 diphényl-6,6 oxazaphosphorinane-1,3,2 et de l'oxo-2 phénoxy-2 méthyl-4 oxadiazaphosphorinane-1,3,4,2

Two phosphorus heterocycles are studied by means of ¹H NMR and IR spectroscopy. The ring conformation is discussed and the torsional angle of the C-5—C-6 fragment is calculated for one of them.     

Sur l'acylation des méthylfluorènes VI. Formylation du méthyl-2-fluorène et du méthyl-3-fluorène selon Rieche

The formylation of 2-methylfluorene and of 3-methylfluorene according Rieche yields 2-methyl-7-fluorene-carbaldehyde and 3-methyl-2-fluorenecarbaldehyde respectively. The constitution of the obtained aldehydes is proved by their conversion into the known 2,7-dimethyl-fluorene and 2,7-dimethyl-9-fluorenone, respectively into the known 2,3-dimethylfluorene and 2,3-dimethyl-9-fluorenone.