Lithium Hydroxide → HCID 67971935, compound

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Reaction Steps

To a solution of the title compound from Step E (800 mg, 1.48 mmol) in MeOH (7.5 ml) was added 1 N LiOH (7.41 ml, 7.41 mmol) and the mixture was stirred at RT overnight. LC-MS showed no more starting material left. The mixture was evaporated to remove MeOH, extracted the aqueous layer with ether 3×50 ml, the aqueous layer was adjusted to PH=4.5 with 1N HCl, then extracted with ethyl acetate 3×50 ml. The combined organic layers was washed with brine (saturated, 1×50 mL), dried (Na2SO4), filtered and the solvent evaporated under reduced pressure to afford title compound (i-5). Yield is 99%. LC-MS: m/z (E/S) 526.2 (MH)+.

Provenance & Evidence