Reference

Indolines

Indolines. (Kawaken Fine Chemicals Co., Ltd., Japan). Jpn. Kokai Tokkyo Koho JP 58146562 A2 1 Sep 1983 Showa, 3 pp. (Japanese). (Japan).Several substances with their cas registry numbers 496-15-1 and 5339-85-5 may be metioned in this study. CODEN: JKXXAF. CLASS: IC: C07D209-08. APPLICATION: JP 82-28534 24 Feb 1982. DOCUMENT TYPE: Patent CA Section: 27 (Heterocyclic Compounds (One Hetero Atom)) Indoline was prepd. by gas phase cyclocondensation of 2-H2NC6H4CH2CH2OH (I) in the presence of boric acid, boric anhydride, phosphoric acid, or metaphosphoric acid supported by alumina or silica gel. Thus, passing 100 g I over 16 mL phosphoric acid/g-alumina at 220-30° 1-15 mg/Hg gave 98% indoline (purity 98%). .

Indoline

Indoline. (Kawaken Fine Chemicals Co., Ltd., Japan). Jpn. Kokai Tokkyo Koho JP 58146563 A2 1 Sep 1983 Showa, 5 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: IC: C07D209-08.Several substances with their cas registry numbers 5339-85-5 and 496-15-1 may be metioned in this study. APPLICATION: JP 82-28535 24 Feb 1982. DOCUMENT TYPE: Patent CA Section: 27 (Heterocyclic Compounds (One Hetero Atom)) Indoline was prepd. by liq. phase cyclocondensation of 2-H2NC6H4CH2CH2OH (I) in the presence of H2SO4, phosphoric acid, boric acid, or TiO2 supported by g-alumina or TiO2. Thus, stirring 40 g I with 10% H2SO4/g-alumina at 210-218°C gave 96.3% indoline (purity 97.7%). .