Synthesis of tetraphenylporphines with active groups in the phenyl rings. 4. Functionally substituted monohydroxy derivatives of tetraphenylporphine

✍ Scribed by S. A. Syrbu; A. S. Semeikin; O. I. Koifman; B. D. Berezin

• Publisher: Springer US
• Year: 1987
• Tongue: English
• Weight: 480 KB
• Volume: 23
• Category: Article
• ISSN: 0009-3122
• DOI: 10.1007/bf00486911

✦ Synopsis

5,6-Benzindole (VI). 25 ml Of a 5% methanol solution of KOH was added to 0,i: gram (0.478 mmole) of compound V. The mixture was kept at 40-50~ for 15 min, then at 20-22~ for 24 h. The methanol was evaporated and the residue extracted with ether. The ether layer was washed with water and dried over MgSO~. After evaporation of ether, 5,6-benzindole was obtained in the form of white or light pinkish flakes, yield 0.07 g (88%), Rf 0.80, mp 180-181~

IRspectruminCHCl3:3490 (Nil); in KBr: 3415 (NH), 1610 (w), 1580 (w), 1560 (w), 1518 (m), 1492 (m) (skeletal vibrations with primary participation of multiple bonds), 860 (s), 736, 703 cm "I (s) (nonplanar vibrations of CH and NH).