By treatment with i-Pr2Zn, functionalized secondary alkyl iodides undergo a smooth iodine-zinc exchange reaction leading to polyfunctional secondary dialkylzinc derivatives. Remarkably, i-Pr2Zn generated in situ from i-PrMgBr and ZnBr2 undergoes this exchange reaction almost 200 times faster than salt free i-Pr2Zn and constitutes a practical source of i-Pr2Zn for the performance of exchange reactions.
用 i-Pr2Zn 处理后,官能化的仲烷基
碘化物会发生顺畅的
碘锌交换反应,生成多官能仲烷基
锌衍
生物。值得注意的是,由 i-PrMgBr 和 ZnBr2 原位生成的 i-Pr2Zn 发生这种交换反应的速度比无盐 i-Pr2Zn 快近 200 倍,是进行交换反应的 i-Pr2Zn 的实用来源。