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Reakcja Niementowskiego

Łysakowska M., Piotrowska D. G.

Wiadomości Chemiczne

2015

[Z] 69, 5-6

369--390

The Niementowski reaction depends on the fusion of anthranilic acid with carbonyl compounds or amides and dates back to the end of the nineteenth century. Numerous variations of the reaction components and modifications of the reaction conditions have appeared in the literature through years. Besides anthranilic acid other synthons including: methyl o-aminobenzoate [25], o-nitrobenzoic acid [26], o-acylaminobenzamide [21], o-aminobenzamide [27], o-aminobenzonitrile [28], isatoic anhydride [29], benzoxasinone [30, 31] have been employed as well. Replacement of the amide component with either amine [9, 32], nitrile [33], imidate [34], thioamide [35], amidine [36], aldehyde [37] or carboxylic acid [28] have also been reported. To increase yield and to reduce the reaction time a number of variables in reaction conditions have been investigated. The best results have been achieved by implementation of a microwave irradiation [38]. The Niementowski reaction and its variants have found widespread use in pharmaceutical and agrochemical fields for the synthesis of compounds containing quinoline and quinazoline systems which are present in a number of natural and synthetic alkaloids [12, 13] and many drugs [1–5].

Badania ekstrakcji jonów chromu (III) kwasem antranilowym w układach siarczanowych

Kalembkiewicz J.

Zeszyty Naukowe Politechniki Rzeszowskiej. Chemia

1998

z. 15 [169]

17-25

Zbadano ekstrakcję jonów chromu (III) w układach dwufazowych typu kwas antranilowy-toluen-woda (H+, Na+, SO2-/4); I=0,5. Określono warunki wydzielania jonów chromu (III) w badanych układach, podano skład kompleksów chromu (III) w fazie organicznej i opisano równaniami równowagi ekstrakcyjne.

It was carried out the extraction of chromium (III) ions in two-phase systems: anthranilic acid-toluene-water (H+, Na+, SO2-/4); I=0,5. The conditions of separation of chromium(III) ions in examined systems were determined. The composition of chromium (III) complexes in organic phase and extraction equilibriums were described.