8-(2-aminoethyl)-4-fluoro-1,6-dihydro-2H-3-oxa-6-aza-as-indacene-7-carboxylic acid 、
盐酸 、
sodium hydroxide 在
乙酸乙酯 、
2-(4-fluoro-1,6-dihydro-2H-3-oxa-6-aza-as-indacen-8-yl)ethylamine 作用下,
反应 2.0h,
以to yield the desired compound, 2-(4-fluoro-1,6-dihydro-2H-3-oxa-6-aza-as-indacen-8-yl)-ethylamine (XII, R1═R2═R3═H, X═F, 23 mg, yield 50%)的产率得到2-(4-fluoro-1,6-dihydro-2H-3-oxa-6-aza-as-indacen-8-yl)ethylamine