Methanol → (2S)-2-(tert-Butoxy)-2-[4,23-dimethyl-22-oxa-1,5,7,8-tetraazapentacyclo[21.2.2.16,9.02,7.013,18]octacosa-2,4,6(28),8,10,13(18),14,16,19-nonaen-3-yl]acetic acid

Participants

Reaction Conditions

Reaction Steps

To a solution of the ethyl (2S)-2-(tert-butoxy)-2-[4,23-dimethyl-22-oxa-1,5,7,8-tetraazapentacyclo[21.2.2.16,9.02,7.013,18]octacosa-2,4,6(28),8,10,13(18),14,16,19-nonaen-3-yl]acetate (0.0366 g, 0.066 mmol)) in dioxane (1 mL)/MeOH (1 mL) was added 10N sodium hydroxide (0.066 mL, 0.655 mmol) and the mixture was stirred at 70° C. for 1 h. The reaction was cooled and concentrated. The crude material was purified via preparative HPLC to give the title compound as diastereomers. LCMS (M+H) calcd for C31H38N4O4: 531.29. found: 531.4.

Provenance & Evidence