Lithium borohydride → Ether isohexane
Reaction equation
[CH2:1]([O:3][C:4](=O)[C@H:5](OC1C=C(NS(C2N=CN(C)C=2)(=O)=O)N=C(S[CH2:25][C:26]2[CH:31]=C[CH:29]=[C:28](F)[C:27]=2F)N=1)C)[CH3:2].[BH4-].[Li+]>C1COCC1>[CH3:2][CH2:1][O:3][CH2:4][CH3:5].[CH3:29][CH2:28][CH2:27][CH:26]([CH3:31])[CH3:25]Participants
4
Procedure
The title compound was prepared according to the procedure outlined in example 24 using 2-[[2-[[(2,3-difluorophenyl)methyl]thio]-6-[[(1-methyl-1H-imidazol-4-yl)sulfonyl]amino]-4-pyrimidinyl]oxy]-(2R)-propanoic acid ethyl ester (the product of step i) (0.28 g), THF (8 mL) and 2 M lithium borohydride in THF (0.81 mL). Purification was by reverse phase HPLC (symmetry as the stationary phase and TFA/acetonitrile as the mobile phase). The resulting oil was triturated with toluene, methanol, then ether/iso-hexane to give the title compound as a white solid. Yield: 0.12 g