Lithium Hydroxide → (9R,11S,14S)-14-tert-butyl-13-oxo-8-oxa-12,15-diazatetracyclo[20.3.1.12,6.1 9,12]octacosa-1(26),2(28),3,5,22,24-hexaene-11-carboxylic acid

Participants

Reaction Conditions

Reaction Steps

LiOH (3.0 eq.) was added to a 0.05 M solution of methyl (9R,11S,14S)-14-tert-butyl-13-oxo-8-oxa-12,15-diazatetracyclo[20.3.1.12,6.1 9,12]octacosa-1(26),2(28),3,5,22,24-hexaene-11-carboxylate 104 in a mixture of THF:EtOH:H2O (2:1:1). The reaction mixture was stirred at 40° C. for 2 h then the solvent was evaporated under reduced pressure. Aqueous HCl (1N) was added to reach pH=6 and the mixture was evaporated to dryness to yield a dark solid which was used without further purification. MS (ES+) m/z 493 (M+H)+.

Provenance & Evidence