3-{2-[5-Cyclohexyl-1-(3,3-dimethyl-2-oxo-butyl)-2-oxo-1,2-dihydro-3H-1,3,4-benzotriazepin-3-yl]-acetylamino}-benzoic acid methyl ester → [5-cyclohexyl-1-(3,3-dimethyl-2-oxo-butyl)-2-oxo-1,2-dihydro-3H-1,3,4-benzotriazepin-3-yl)-acetic acid ethyl ester

Participants

Reaction Steps

The title compound was obtained by the method used in the preparation of 3-{2-[5-cyclohexyl-1-(3,3-dimethyl-2-oxo-butyl)-2-oxo-1,2-dihydro-3H-1,3,4-benzotriazepin-3-yl]-acetylamino}-benzoic acid methyl ester (Example 1) except that (5-amino-indol-1-yl)-acetic acid ethyl ester (prepared in two steps from 5-nitroindole) was used instead of 3-amino-benzoic acid methyl ester in step e, followed by reaction of the product obtained, in place of [5-cyclohexyl-1-(3,3-dimethyl-2-oxo-butyl)-2-oxo-1,2-dihydro-3H-1,3,4-benzotriazepin-3-yl]-acetic acid ethyl ester (Example 1, step c), according to the method of Example 1, step d. 1H NMR (CDCl3) 8.21 (1H, s), 7.70 (1H, s), 7.47 (2H, m), 7.27 (1H, m), 7.05 (4H, m), 6.47 (1H, d), 4.79 (2H, s), 4.68 (2H, m), 4.39 (1H, d), 4.20 (1H, d), 2.78 (1H, m), 2.18-1.07 (19H, m). The compound was further characterised as the N-methyl-D-glucamine salt. Found: C, 58.02; H, 7.08; N, 9.62%; C32H37N5O5.C7H17NO5.1.9H2O.0.6C4H8O2 requires: C, 58.23; H, 7.39; N, 9.84%.

Provenance & Evidence