A direct synthesis of salicylic acid chlorides is achieved via "metal-driven" intracomplex acylation of bromomagnesium and aluminum phenoxides with phosgene. Salicylic acids 5 and some derivatives 6, 7 can be obtained by quenching the reaction mixture with convenient reagents. Moreover the reaction of lithium phenylacetylide with 3 provides a new convenient approach to ortho-hydroxyaryl alkynyl ketones like 8. The oriented complex 2, involving the metal phenoxide and phosgene is proposed to account for the ortho-regioselective control of the reaction.
通过“
金属驱动”的复合体内酰化反应,
溴化镁和铝
酚氧化物与
光气反应,直接合成
水杨酸氯化物。通过使用合适的试剂淬灭反应混合物,可以获得
水杨酸及其一些衍
生物。此外,
锂苯乙炔与3的反应提供了一种新颖且便捷的方法,以合成类似8的邻羟基
芳烃炔基酮。建议的定向复合体2包含
金属
酚氧化物和
光气,旨在解释该反应的邻位区域选择性控制。