The Suzuki−Miyaura cross-coupling of aryl phosphates using Ni(PCy3)2Cl2 as an inexpensive, bench-stable catalyst is described. Broad substrate scope and high efficiency are demonstrated by the syntheses of more than 40 biaryls and by constructing complex organic molecules. The poor reactivity of aryl phosphates relative to aryl halides is successfully employed to construct polyarenes by selective cross-coupling
Rhodium(II)-Catalyzed Synthesis of<i>N</i>-Aryl-<i>N′</i>-tosyldiazenes from Primary Aromatic Amines Using (Tosylimino)aryliodinane: A Potent Stable Surrogate for Diazonium Salts
The first example of the single-step synthesis of N-aryl-N'-tosyldiazenes from primary aromaticamines is described. A wide range of aromaticamines provided the corresponding products in high yields via an N−N bond formation with Rh(II)-nitrene intermediates, generated in situ from dirhodium(II) complex catalysts and (tosylimino)-2,4,6-trimethylphenyliodinane (TsN=IMes), followed by oxidation. The
描述了从芳香伯胺一步合成 N-芳基-N'-甲苯磺酰基二氮烯的第一个例子。范围广泛的芳香胺通过与 Rh(II)-硝烯中间体形成 NN 键以高产率提供相应的产物,由二铑 (II) 配合物催化剂和 (tosylimino)-2,4,6- 原位生成三甲基苯基碘烷 (TsN=IMes),然后氧化。合成的 N-芳基-N'-甲苯磺酰基二氮烯已成功证明可作为重氮盐在芳香伯胺的两步脱氨基转化中的有效稳定替代物。
Room-Temperature Suzuki−Miyaura Couplings in Water Facilitated by Nonionic Amphiphiles
作者:Bruce H. Lipshutz、Tue B. Petersen、Alexander R. Abela
DOI:10.1021/ol702714y
日期:2008.4.1
Use of a dilute aqueous solution containing a nonionic amphiphile allows efficient Suzuki-Miyaura cross-couplings of arylboronic acids with a wide array of aryl halides and pseudohalides, including sterically hindered and lipophilic substrates, in most cases at room temperature.