Methanol → (S)-2-{[(3S,8S)-3-[3-(3,4-Dichloro-benzyloxy)-phenyl]-7-((R)-1-phenyl ethylcarbamoyl)-2,3,6,7,8,9-hexahydro-[1,4]dioxino[2,3-g]isoquinoline-8-carbonyl]-amino}-3-[4-(2,3-dimethyl-pyridin-4-yl)-phenyl]-propionic acid

Participants

Reaction Steps

(R)-(+)-α-Methylbenzyl isocyanate (5 mg) was added to a solution of (S)-2-({(3S,8S)-3-[3-(3,4-dichloro-benzyloxy)-phenyl]-2,3,6,7,8,9-hexahydro-[1,4]dioxino[2,3-g]isoquinoline-8-carbonyl}-amino)-3-[4-(2,3-dimethyl-pyridin-4-yl)-phenyl]-propionic acid methyl ester (20 mg) in 0.5 mL DCM and stirred for 1 h at room temperature. The reaction mixture was directly loaded onto a silica gel column (1:1 EtOAc/hexanes to 6% MeOH in 1:1 EtOAc/hexanes) to isolate the desired product (16 mg).

Provenance & Evidence