反应详情

The crude product of the title compound was synthesized by conducting the similar reaction to that mentioned in Example 12 (12a) using 3-chloro-4-isobutylbenzoic acid (0.11 g, 0.50 mmol) that was obtained in Example 24 (24h), 1-hydroxybenzotriazole (72 mg, 0.53 mmol), 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride (0.10 g, 0.53 mmol), N′-hydroxy-2-methyl-6-{[(triisopropylsilyl)oxy]methyl}pyridine-3-carboximidamide (0.16 g, 0.48 mmol) that was obtained in Example 24 (24d), and a 1.0 M solution of tetrabutylammonium fluoride in tetrahydrofuran (0.96 ml, 0.96 mmol). Subsequently, the crude product of the tile compound thus obtained was purified by chromatography on a silica gel column using a mixed solvent of ethyl acetate and hexane (1:1) as the eluent to afford the title compound (0.15 g) in a yield of 89% as a crystalline white solid.

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