Hydrochloric Acid → 5-{(2R)-2-[(2R)-2-(3-Chloro-phenyl)-2-hydroxy-ethylamino]-propyl}-benzo[1,3]dioxole-2,2-dicarboxylic aicd bis-(2,2,4-trimethyl-pentyl) ester

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The title compound was prepared from 5-{2-[2-(3-chloro-phenyl)-2-hydroxy-ethylamino]-propyl}-benzo[1,3]dioxole-2,2-dicarboxylic acid and 2,2,4-trimethylpentanol according to the procedure of Example 1 as an off-white solid; 1H NMR (DMSO-d6,400 MHz) δ 0.65-0.9 (m, 24H, 8×CH3), 1.09 (d, J=6.4 Hz, 3H, CH3), 1.1-1.4 (m, 4H, CH2, CH2), 2.62 (m, 1H, CH), 3-3.3 (m, 3H, CH, CH2), 3.4 (brs, 1H, CH), 4.04 (s, 4H, OCH2, OCH2), 5.05 (m, 1H, CH), 6.34 (d, J=3.95 Hz, 1H, OH), 6.85 (dd, J=7.9, 1.32 Hz, 1H, Ar--H), 7.07 (m, 2H, Ar--H), 7.38-7.42 (m, 3H, Ar--H), 7.5 (s, 1H, Ar--H), 8.7 (brs, 1H, NH), 9.1 (brs, 1H, NH); IR (KBr, cm-1) 3300 (OH), 2900 (NH), 1760 (CO); MS m/e 646 (M+H)+ ; Analysis for: C36H52ClNO7 ×HCl: Calc'd: C, 63.33; H, 7.83; N, 2.05; Found: C, 62.96; H, 7.71; N, 2.44.

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