C([O:7][CH2:8][C@@H:9]([O:43][C:44]([CH3:47])([CH3:46])[CH3:45])[C:10]1[C:34]([CH3:35])=[CH:33][C:13]2[N:14]=[C:15]([C:17]3[CH:22]=[CH:21][N:20]=[C:19](C4C=C5C(C=NN5C)=CC=4)[CH:18]=3)[S:16][C:12]=2[C:11]=1[C:36]1[CH:41]=[CH:40][C:39]([Cl:42])=[CH:38][CH:37]=1)(=O)C(C)(C)C.C(OC[C@@H](OC(C)(C)C)C1C(C)=CC2N=C([C:64]3[CH:65]=[C:66]4[C:70](=[CH:71][CH:72]=3)[N:69]([CH3:73])[N:68]=[CH:67]4)SC=2C=1C1C=CC(Cl)=CC=1)(=O)C(C)(C)C.CO.[OH-].[Na+]>C(OCC)(=O)C>[C:44]([O:43][C@@H:9]([C:10]1[C:34]([CH3:35])=[CH:33][C:13]2[N:14]=[C:15]([C:17]3[CH:22]=[CH:21][N:20]=[C:19]([C:64]4[CH:65]=[C:66]5[C:70](=[CH:71][CH:72]=4)[N:69]([CH3:73])[N:68]=[CH:67]5)[CH:18]=3)[S:16][C:12]=2[C:11]=1[C:36]1[CH:37]=[CH:38][C:39]([Cl:42])=[CH:40][CH:41]=1)[CH2:8][OH:7])([CH3:46])([CH3:47])[CH3:45](S)-2-tert-butoxy-2-(7-(4-chlorophenyl)-5-methyl-2-(2-(1-methyl-1H-indazol-6-yl)pyridin-4-yl)benzo[d]thiazol-6-yl)ethyl pivalate and (S)-2-tert-butoxy-2-(7-(4-chlorophenyl)-5-methyl-2-(1-methyl-1H-indazol-5-yl)benzo[d]thiazol-6-yl)ethyl pivalate was telescoped into the subsequent reaction. To the previous reaction mixture, methanol and 2M NaOH were added and reaction mixture was heated at 55° C. overnight. Reaction mixture was cooled to rt, diluted with ethyl acetate and washed with brine. The organic layer was dried (MgSO4), filtered, concentrated and purified by CombiFlash (Hex/EtOAc) to give (S)-2-tert-butoxy-2-(7-(4-chlorophenyl)-5-methyl-2-(2-(1-methyl-1H-indazol-5-yl)pyridin-4-yl)benzo[d]thiazol-6-yl)ethanol.
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