tert-butyl N-[(1S,3R)-3-aminocyclopentyl]carbamate

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: The trans-(3-hydroxy-cyclopentyl)-carbamic acid tert-butyl ester was converted to cis-(3-amino-cyclopentyl)-carbamic acid tert-butyl ester using the same method described previously. The resulting compound was further converted to cis-[3-(2,5-dimethyl-benzoimidazol-1-yl)-cyclopentyl]-carbamic acid tert-butyl ester using the same method described in the preparation of the hydrochloride salt of trans-3-(2,5-dimethyl-benzoimidazol-1-yl)-cyclopentylamine. After the acid cleavage of the carbamic acid tert-butyl ester and base extraction, cis-3-(2,5-dimethyl-benzoimidazol-1-yl)-cyclopentylamine was obtained as pale brown oil. LR-MS calcd for C14H19N3 (m/e) 229.1579, obsd 230.2 (M+H). After the acid cleavage of the carbamic acid tert-butyl ester and base extraction

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: N-(cis-3-((6-amino-5-(4-phenoxyphenyl)pyrimidin-4-yl)amino)cyclopentyl)acrylamide was prepared from 5,6-dichloropyrimidin-4-amine, tert-butyl (cis-3-aminocyclopentyl)carbamate, (4-phenoxyphenyl)boronic acid, and acryloyl chloride using methods B, C, D, and F. HPLC: 98%. MS: m/z=416 [M+H]+. 1H-NMR (DMSO-d6) δ 8.36 (s, 1H), 8.11 (d, 1H), 7.45 (t, 2H), 7.28-7.12 (m, 7H), 7.07-6.82 (m, 3H), 6.15 (dd, 1H), 6.04 (d, 1H), 5.56 (d, 1H), 4.43 (broad s, 1H), 3.96 (sextet, 1H), 2.22 (m, 1H), 1.90-1.80 (m, 2H), 1.68-1.43 (m, 3H).

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: A mixture of ((1S,3R)-3-benzyloxycarbonylamino-cyclopentyl)-carbamic acid tert-butyl ester (635 mg, 1.90 mmol) and 10% Pd on carbon (202 mg, 0.19 mmol) in ethanol (15 mL) was stirred at ambient temperature under an atmosphere of hydrogen for 16 hours. The reaction mixture was filtered through Celite® which was washed with ethanol and the filtrate concentrated under vacuum to afford 390 mg (quant.) of ((1S,3R)-3-amino-cyclopentyl)-carbamic acid tert-butyl ester as a colorless oil. LCMS (Method H, ESI): RT=0.38 min, m+H=200.9; 1H NMR (400 MHz, DMSO) δ: 6.82 (d, 1H), 3.75-3.66 (m, 1H), 3.17 (m, 2H), 1.98 (m, 1H), 1.70 (m, 3H), 1.49 (m, 1H), 1.37 (s, 9H), 1.31 (m, 1H), 1.14 (m, 1H). The reaction mixture was filtered through Celite® which was washed with ethanol the filtrate concentrated under vacuum