tert-butyl (2R)-2-{[tert-butyl(dimethyl)silyl]oxy}-2-[6-(2,5-dimethyl-1H-pyrrol-1-yl)-3-pyridinyl]ethyl{[(2R)-6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-3,4-dihydro-2H-chromen-2-yl]methyl]carbamate 、
4-碘苯甲酸甲酯 、
disodium;carbonate 在
Pd(dppf) 氩 、 silica gel 作用下,
以
甲苯 、
1,4-二氧六环 为溶剂,
反应 16.25h,
以flash chromatography of the residue over silica gel using 20% ethyl acetate/hexanes afforded 276 mg (69%) of the desired product的产率得到methyl 4-{(2R)-2-[((tert-butoxycarbonyl){(2R)-2-{[tert-butyl(dimethyl)silyl]-oxy}-2-[6-(2, 5-dimethyl-1H-pyrrol-1-yl)-3-pyridinyl]ethyl}-amino)methyl]-3,4-dihydro-2H-chromen-6-yl}benzoate