ethyl 2-(tert-butoxy)-2-[5-chloro-4-(3,4-dihydro-2H-11-benzopyran-6-yl)-2-methylthiophen-3-yl]acetate 、
2-甲基吡啶-4-硼酸频哪酯 、
potassium carbonate 在
[1,3-bis(2,6-diisopropylphenyl)imidazol-2-ylidene](3-chloropyridyl)palladium(II) dichloride
氩 、 crude material 、 silica gel 、 cyclohexane, ethyl acetate 作用下,
以
甲苯 、
甲醇 为溶剂,
反应 0.33h,
以to give ethyl 2-(tert-butoxy)-2-[4-(3,4-dihydro-2H-1-benzopyran-6-yl)-2-methyl-5-(2-methylpyridin-4-yl)thiophen-3-yl]acetate (14a) (118 mg, 0.25 mmol, 92%)的产率得到ethyl 2-(tert-butoxy)-2-[4-(3,4-dihydro-2H-1-benzopyran-6-yl)-2-methyl-5-(2-methylpyridin-4-yl)thiophen-3-yl]acetate