通过衍生自芳基或烷基溴化物的格利雅试剂的反应,然后与芳族或脂族醛的反应以及随后用1,3-二碘的处理,可以有效地以高收率高效地制备各种二芳基酮,烷基芳基酮和二烷基酮。一锅法中的-5,5-二甲基乙内酰脲和K 2 CO 3。相同的处理的芳族溴化物轴承吸电子基团,如酯,腈,酮和硝基与我-PrMgCl·LiCl或PhMgCl代替Mg,也以良好的收率提供了相应的二芳基和烷基芳基酮。以上方法是用于制备各种带有富电子芳族基团和缺电子芳族基团的二芳基酮和烷基芳基酮以及二烷基酮的简单且实用的无过渡金属的方法。
Preparation and Reactions of Polyfunctional Magnesium Arylcuprates Obtained by an Iodine-Copper Exchange
作者:Paul Knochel、Xiaoyin Yang
DOI:10.1055/s-2003-43358
日期:——
The preparation of polyfunctional magnesium cuprates of type 1 can be achieved via an iodine-copper exchange reaction using the cyclic magnesium cuprate 3. A range of functional groups like an ester, halide (F, Br), nitrile or even a ketone can be tolerated. The new cuprates can be acylated and allylated in good yields leading to a range of polyfunctional products.
A photoinduced nickel-catalyzed reductive carbonylative coupling from organohalides and N-(acyloxy)phthalimide esters with phenyl formate as the carbonyl source has been developed. This reaction could perform smoothly under mild conditions, and a series of aryl–alkyl and alkyl–alkyl unsymmetrical ketones were produced without the need of stoichiometric metal reductants. Mechanistic studies indicate