Lithium Hydroxide → HCID 67253348, compound

Participants

Reaction Conditions

Reaction Steps

A solution of {6-[2-(3-tert-butoxycarbonylamino-propylamino)-pyrimidin-4-yloxy]-1-hydroxy-4-methyl-1,3-dihydro-benzo[c][1,2]oxaborol-3-yl}-acetic acid ethyl ester (0.39 g, 0.78 mmol) in THF (10 mL) was treated with lithium hydroxide (0.089 g, 3.90 mmol) in water (2 mL) at 0° C. The mixture was stirred at 0° C. for 1 hour, then at room temperature for 1 hour. The mixture was quenched with 2N HCl to pH 2 then concentrated in vacuo. The residue was diluted with brine and extracted with ethyl acetate. The organic extracts were dried (Na2SO4), filtered and concentrated to give {6-[2-(3-tert-butoxycarbonylamino-propylamino)-pyrimidin-4-yloxy]-1-hydroxy-4-methyl-1,3-dihydro-benzo[c][1,2]oxaborol-3-yl}-acetic acid as a yellow solid (0.27 g, 74%) after lyophilization. 1H NMR (400 MHz, CD3OD) δ8.09 (d, J=6.25 Hz, 1H), 7.22 (s, 1H), 7.10 (s, 1H), 6.32 (m, 1H), 5.67 (d, J=6.25 Hz, 1H), 3.28-3.14 (br m, 2H), 3.17 (dd, J=15.24, 2.35 Hz, 1H), 3.10-2.90 (m, 2H), 2.38 (s, 3H), 2.36-2.25 (m, 1H), 1.70-1.50 (m, 2H), 1.41 (s, 9H).

Provenance & Evidence