A convenient and high-yielding three-step synthesis of 8-halonaphthalene-1-carbonitriles has been achieved by ring opening of 1H-naphtho[1,8-de][1,2,3]triazine with the corresponding halides as the key step. Naphthalene-1,8-dicarbonitrile also has been synthesised from 8-bromonaphthalene-1-carbonitrile via palladium-catalysed cyanation of the aryl bromide. The crystal structures of 8-chloronaphthalene-1-carbonitrile
通过1H-
萘并[1,8-de][1,2,3]三嗪的开环,以相应的卤化物为关键,实现了8-卤代
萘-1-腈的方便、高产的三步合成步。Naphthalene-1,8-dicarbonitrile 也由 8-bromonaphthalene-1-carbonitrile 通过
钯催化的芳基
溴氰化合成。8-
氯萘-1-腈的晶体结构、
溴类似物的A多晶型物和
萘-1,8-二腈的晶体结构是同晶的,具有正交对称性。
溴化合物和
碘类似物的 B 多晶型物也是同晶型的,但具有单斜对称性。在所有卤代腈中,分子在卤素原子和腈基团的位置上都是无序的。在任何固体中都不存在分子间 X···NC 相互作用。