Sodium borohydride → N-(2-(2-(hydroxymethyl)pyridin-4-yl)-6-methoxy-5-(2-methoxyphenoxy)pyrimidin-4-yl)-5-methylpyridine-2-sulfonamide

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반응 단계

100 mg of 4-[4-methoxy-5-(2-methoxy-phenoxy)-6-(5-methyl-pyridine-2-sulfonylamino)-pyrimidin-2-yl]-pyridine-2-carboxylic acid methyl ester, product of example 22, were dissolved in a mixture of EtOH/THF (each 15 ml) on gentle warming and subsequently treated with 42 mg of CaCl2 and 28 mg of NaBH4 at RT. The reaction mixture was stirred at RT for 18 h until which time starting material was consumed according to TLC analysis. The mixture was partitioned between diluted HCl and CH2Cl2. The organic layer was dried over Na2SO4 and the solvent removed in vacuo to give 5-methyl-pyridine-2-sulfonic acid [2-(2-hydroxymethyl-pyridin-4-yl)-6-methoxy-5-(2-methoxy-phenoxy)-pyrimidin-4-yl]-amide as a white solid. ISN mass spectrum, m/e 508.3 (M−1 calculated for C24H23N5O6S: 508).

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