A compound represented by the formula (I) or a salt thereof:
wherein a ring Z is a 5 to 6-membered heteroaromatic ring having one or two heteroatoms in the ring; X1 is a hydrogen atom, a hydroxy group, a hydroxy C1-6 alkyl group, -B(OH)2, a boronate ester group, a cyclic boronate ester group, a boranyl group, a cyclic boranyl group, -BF3Mn1, -Sn(R12)(R13)(R14), a leaving group, a carboxy group, a formyl group, or -NR16R17; and X2 is a hydrogen atom or -CO2R18.
式 (I) 所代表的化合物或其盐:
其中环 Z 是 5 至 6 元杂芳环,环中有一个或两个杂原子;X1是
氢原子、羟基、羟基 C1-6烷基、-B(OH)2、
硼酸酯基、环
硼酸酯基、
硼烷基、环
硼烷基、-BF3Mn1、-Sn(R12)(R13)(R14)、离去基团、羧基、甲酰基或-NR16R17;以及 X2是
氢原子或-CO2R18。