✦ LIBER ✦
Synthese von Trispiro[5.2.2.5.2.2.]heneicosa-1,4,13,16-tetraen-3,15-dion durch doppelte intramolekulare C-Alkylierung eines Diphenols
✍ Scribed by R. S. Atkinson; André S. Dreiding
- Publisher
- John Wiley and Sons
- Year
- 1967
- Tongue
- German
- Weight
- 796 KB
- Volume
- 50
- Category
- Article
- ISSN
- 0018-019X
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✦ Synopsis
On chroming the dyestuff l-amino-2-hydroxy-naphthalene-4-sulfonic acid piperidide + l-phenyl-3-methyl-5-pyrazolone, only one 1 : 2 chromium complex is formed. This fact as well as the absorption spectra and the great stability of the complex indicate that the complex must be coordinated in the DREW-PFITZNER arrangement, and that the sandwich arrangement must be excluded. Since the steric structure of the 1 : 2-complex is already preformed in the adequate 1 : 1-complex, our results disprove the conclusions presented by IDELSON et al. [l] [ 3 ] .