Lithium Hydroxide → HCID 21947233, compound

Participants

Reaction Steps

Ester 33 (50 mg) in THF-water (400 uL-100 uL) was treated with LiOH (7 mg) and the mixture stirred for 3 hours at room temperature. The mixture was evaporated, diluted with EtOAc, washed with 1.0N HCl and brine then dried over magnesium sulfate, filtered, and concentrated in vacuo to give 2-[2-{2-cyclohexyl-2-[(pyrazine-2-carbonyl)-amino]-acetylamino}-3,3-dimethyl-butyryl)-6,10-dithia-2-aza-spiro[4.5]decane-3-carboxylic acid 34 as a white solid which was used in the next step without further purification. Mass Spec. MH+=578.0, MH−=576.2.

Provenance & Evidence