Cyclobutanol → HCID 57926010, compound

Participants

Reaction Steps

To a solution of [4-(2-tert-butoxycarbonylamino-5-thiophen-2-yl-phenylcarbamoyl)-benzyl]-methyl-phosphinic acid (57 mg, 0.117 mmol), cyclobutanol (0.038 mL, 0.703 mmol), and Hunig's Base (0.031 mL, 0.176 mmol) in DMF (2 mL) was added BOP (78 mg, 0.176 mmol). After 18 h, the reaction was purified by preparative HPLC Reverse phase (C-18), eluting with acetonitrile/water plus 0.025% TFA (40-100%) to give material after extraction of fractions with EtOAc. 1H NMR (DMSO-d6) δ 9.88 (s, 1H), 8.74 (br s, 1H), 7.90 (d, J=7.6 Hz, 2H), 7.79 (br s, 1H), 7.58 (d, J=8.5 Hz, 1H), 7.52-7.47 (m, 2H), 7.44-7.39 (m, 3H), 7.12-7.09 (m, 1H), 4.64 (m, 1H), 3.27 (dd, J=23.2, 17.6 Hz, 1H), 3.25 (dd, J=23.2, 17.6 Hz, 1H), 2.25-21.4 (m, 2H), 2.05-1.94 (m, 2H), 1.67-1.60 (m, 1H), 1.49-1.42 (m, 1H), 1.43 (s, 9H), 1.31 (d, J=14.1 Hz, 3H). MS: cal'd 441 (MH+; -Boc), exp 441 (MH+; -Boc).

Provenance & Evidence