Sodium borohydride → 4-{5-(1-Hydroxyethyl)-6-methyl-2-thioxo-1-[3-(trifluoromethyl)phenyl]-1,2,3,4-tetrahydro-4-pyrimidinyl}benzonitrile

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Reaction Steps

4-{5-Acetyl-6-methyl-2-thioxo-1-[3-(trifluoromethyl)phenyl]-1,2,3,4-tetrahydro-4-pyrimidinyl}benzonitrile (Example 1; 100 mg, 0.24 mmol) is dissolved in 3 ml methanol, and sodium borohydride (10 mg, 0.26 mmol) is added. After stirring at room temperature for 1 h, the crude mixture is purified via preparative HPLC (RP18-column; eluent: acetonitrile-water, gradient 10:90 to 90:10) to give the product as a 1.6:1-mixture of the two diastereomers.

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