Highly Efficient Suzuki–Miyaura Coupling of Heterocyclic Substrates through Rational Reaction Design
作者:Christoph A. Fleckenstein、Herbert Plenio
DOI:10.1002/chem.200701877
日期:2008.5.9
the presence of 0.5 mol % of catalyst, and S-heterocyclic aryl chlorides and aryl- or 3-pyridylboronic acids required 0.01-0.05 mol % Pd catalyst for full conversion. The key to the high activity of the Pd-phosphine catalyst is the rational design of the reaction parameters (i.e., the presence of water in the reaction mixture, good solubility of reactants and catalyst in n-butanol/water (3:1), and
由简单的市售起始原料通过三个步骤以64%的总收率合成了二环己基(2-磺基-9-(3-(4-磺基苯基)丙基)-9H-芴-9-基)phosph盐。从相应的膦和[Na(2)PdCl(4)]获得的高度水溶性的催化剂使各种N和S杂环底物的Suzuki偶联成为可能。在水/正丁醇溶剂混合物中,在0.005-0.05 mol%Pd催化剂存在下,于100摄氏度下,氯吡啶(-喹啉)和芳基氯与芳基,吡啶或吲哚硼酸按定量收率偶合,氯嘌呤定量铃木在0.5 mol%的催化剂和S-杂环芳基氯化物以及芳基或3-吡啶基硼酸的存在下偶联需要0.01-0.05 mol%的Pd催化剂才能完全转化。