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PREPARATION AND ISOMERIZATION OF DICHLOROAMINO-3,5-DIFLUORORO-4- HEPTAFLUOROISOPROPYL-6-METHOXY PYRIDINE | ||
Journal of Sciences, Islamic Republic of Iran | ||
مقاله 3، دوره 5، شماره 2، آذر 1994 اصل مقاله (262.14 K) | ||
چکیده | ||
Treatment of 4-heptafluoroisopropyl-2-methoxy-3,5,6-trifluropyridine (4 ) with aqueous ammonia in THF gave 2-amino-3,5-difluoro-4-heptafluoroisopropyl- 6-methoxy pyridine (5) in 7 1% yield. Chlorination of this amine with 'ButOCl at -16°C gave an unstable product, namely 2-dichloroarnino-3,5- difluoro-4-heptafluoroisopropyl-6-methoxy pyridine (6). Iodine-catalysed rearrangement of this dichloroamino-compound provided a ca. 70:30 mixture of 3-chloro-6-chloroimino-3,5-difluoro- 4-heptafluoroisopropyl-2-methox y -I azacyclohexa- l,4-diene (7) and 5-chloro-6-chloroirnino-3,5-difluoro-4-hepta fluoroisopropyl- 2-methoxy- 1 -azacyclohexa- l,3-diene(8). The C NMR spectra of these imines have also been studied | ||
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