Lithium Hydroxide → HCID 68676918, compound

Participants

Reaction Steps

(R)-2-(4-benzyloxy-3-chloro-5-methyl-phenyl)-1-methoxycarbonyl-ethyl 4-(2-oxo-1,2,4,5-tetrahydro-1,3-benzodiazepin-3-yl)-piperidine-1-carboxylate was prepared analogously to Example 7f from 7.0 g (20.9 mmol) methyl (R)-3-(4-benzyloxy-3-chloro-5-methyl-phenyl)-2-hydroxy-propionate and 5.2 g (21.2 mmol) 3-piperidin-4-yl-1,3,4,5-tetrahydro-1,3-benzodiazepin-2-one. The crude product was dissolved in 150 mL THF and combined with a solution of 0.50 g (20.6 mmol) LiOH in 50 mL water. The reaction mixture was stirred overnight at RT, combined with water and the organic solvent was eliminated i.vac. The aqueous phase was washed twice with EtOAc and acidified with 21 mL 1 M HCl. The resulting oil was exhaustively extracted with EtOAc. The combined organic extracts were dried, filtered and evaporated down i.vac.

Provenance & Evidence