(R)-8-cyclopropyl-6-(3-isopropylpiperazin-1-yl)-3,3-dimethyl-3,4-dihydro-1H-pyrano[3,4-c]pyridine-5-carbonitrile 、
三乙胺 、
丁二酸单甲酯酰氯 在
Brine 、
Sodium sulfate-III 、 crude product 、
二氯甲烷,丙烷-2-酮 作用下,
以
二氯甲烷 为溶剂,
反应 16.0h,
以to afford 368 mg of (R)-methyl 4-(4-(5-cyano-8-cyclopropyl-3,3-dimethyl-3,4-dihydro-1H-pyrano[3,4-c]pyridin-6-yl)-2-isopropylpiperazin-1-yl)-4-oxobutanoate as light yellow oil的产率得到(R)-methyl 4-(4-(5-cyano-8-cyclopropyl-3,3-dimethyl-3,4-dihydro-1H-pyrano[3,4-c]pyridin-6-yl)-2-isopropylpiperazin-1-yl)-4-oxobutanoate