(S)-3-(4'-cyano-biphenyl-4-yl)-2-({(S)-3-[4-(3,4-dichloro-benzyloxy)-phenyl]-2,3,6,7,8,9-hexahydro-[1,4]dioxino[2,3-g]isoquinoline-8-carbonyl}-amino)-propionic acid methyl ester → (S)-2-({(S)-7-(2-tert-butoxycarbonylamino-benzothiazole-6-sulfonyl)-3-[4-(3,4-dichloro-benzyloxy)-phenyl]-2,3,6,7,8,9-hexahydro-[1,4]dioxino[2,3-g]isoquinoline-8-carbonyl}-amino)-3-(4'-cyano-biphenyl-4-yl)-propionic acid methyl ester

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(S)-3-(4′-Cyano-biphenyl-4-yl)-2-({(S)-3-[4-(3,4-dichloro-benzyloxy)-phenyl]-2,3,6,7,8,9-hexahydro-[1,4]dioxino[2,3-g]isoquinoline-8-carbonyl}-amino)-propionic acid methyl ester (25 mg) was reacted with (6-chlorosulfonyl-benzothiazol-2-yl)-carbamic acid tert-butyl ester to give (S)-2-({(S)-7-(2-tert-butoxycarbonylamino-benzothiazole-6-sulfonyl)-3-[4-(3,4-dichloro-benzyloxy)-phenyl]-2,3,6,7,8,9-hexahydro-[1,4]dioxino[2,3-g]isoquinoline-8-carbonyl}-amino)-3-(4′-cyano-biphenyl-4-yl)-propionic acid methyl ester according to General Procedure E. This product (25 mg) was deprotected and hydrolysed according to General Procedure C and B to give the title compound. LCMS (m/z): 947.

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