盐酸 、
7-[(3S)-3-methoxypyrrolidin-1-yl]-1-(tetrahydro-2H-pyran-2-yl)-1,4-dihydrochromeno[4,3-c]pyrazole-3-carboxylic acid 在
crude product 作用下,
以
1,4-二氧六环 为溶剂,
反应 2.5h,
以to provide 7-[(3S)-3-methoxypyrrolidin-1-yl]-1,4-dihydrochromeno[4,3-c]pyrazole-3-carboxylic acid hydrochloride in 19% yield as a yellow solid的产率得到7-[(3S)-3-methoxypyrrolidin-1-yl]-1,4-dihydrochromeno[4,3-c]pyrazole-3-carboxylic acid hydrochloride