ne/[PdCl(C3H5)]2 efficiently catalyses the Suzuki reaction of heteroarylboronicacids with aryl bromides and also the coupling of arylboronic acids with heteroaryl bromides. The coupling of thiophene- or benzothiopheneboronic acids, furan- or benzofuranboronic acids and 3-pyridineboronic acid with a variety of aryl bromides gave the corresponding coupling products in good yields. However, in most cases
顺式,顺式,顺式-1,2,3,4-四(二苯基膦甲基)环戊烷/ [PdCl(C 3 H 5)] 2有效催化杂芳基硼酸与芳基溴化物的Suzuki反应,以及芳基硼酸与杂芳基的偶联溴化物。噻吩或苯并噻吩硼酸,呋喃或苯并呋喃硼酸和3-吡啶硼酸与各种芳基溴的偶合得到相应的偶合产物,收率很高。然而,在大多数情况下,使用杂芳基溴化物与芳基硼酸进行的逆反应在底物/催化剂的比例方面获得了更好的结果。
Suzuki Coupling Reactions of Heteroarylboronic Acids with Aryl Halides and Arylboronic Acids with Heteroaryl Bromides Using a Tetraphosphine/Palladium Catalyst
4-Tetrakis(diphenylphosphinomethyl)cyclopentane/[PdCl(C 3 H 5 )] 2 efficiently catalyses the Suzuki reaction of heteroarylboronicacids with aryl bromides and also the coupling of arylboronic acids with heteroaryl bromides. The coupling of thiopheneboronic acids. 3-furanboronic acid and 3-pyridineboronic acid with a variety of aryl bromides gave the corresponding adducts in good yields. However, in most cases,
cis,cis,cis-1,2,3,4-Tetrakis(diphenylphosphinomethyl)cyclopentane/[PdCl(C 3 H 5 )] 2 有效催化杂芳基硼酸与芳基溴化物的 Suzuki 反应以及芳基硼酸与杂芳基的偶联溴化物。噻吩硼酸的偶联。3-呋喃硼酸和3-吡啶硼酸与各种芳基溴化物以良好的产率得到相应的加合物。然而,在大多数情况下,杂芳基溴化物与芳基硼酸的反应在底物/催化剂比方面获得了更好的结果。
General and highly efficient fluorinated-N-heterocyclic carbene–based catalysts for the palladium-catalyzed Suzuki–Miyaura reaction
作者:Taoping Liu、Xiaoming Zhao、Qilong Shen、Long Lu
DOI:10.1016/j.tet.2012.05.068
日期:2012.8
acid with aryl halides and heteroarylhalides, but also efficient for coupling of other heteroarylhalides and heteroaryl boronic acids. Finally, the catalyst is highly effective for Suzuki–Miyaura reaction of aryl bromides and chlorides with 0.01–0.1 mol % loading if the temperature was raised at refluxed THF/H2O.
据报道,一种通用且高效的三氟甲基化-N-杂环卡宾(NHC)基催化剂可用于钯催化的Suzuki-Miyaura反应。在催化剂的存在下,未活化的芳基氯和三氟甲磺酸与芳基硼酸的反应在室温下发生,收率好至极好(63-98%)。此外,由Pd(OAc)2 /咪唑鎓盐6a的组合产生的催化剂不仅对于杂芳基硼酸与芳基卤化物和杂芳基卤化物的偶联有效,而且对其他杂芳基卤化物和杂芳基硼酸的偶联有效。最后,如果温度在回流的THF / H 2 O上升高,则该催化剂对于0.01-0.1 mol%负载量的芳基溴化物和氯化物的Suzuki-Miyaura反应非常有效。
The First General Method for Palladium-Catalyzed Negishi Cross-Coupling of Aryl and Vinyl Chlorides: Use of Commercially Available Pd(P(<i>t</i>-Bu)<sub>3</sub>)<sub>2</sub> as a Catalyst
作者:Chaoyang Dai、Gregory C. Fu
DOI:10.1021/ja003954y
日期:2001.3.1
With a single protocol, commerciallyavailable Pd(P(t-Bu)(3))(2) can effect the Negishi cross-coupling of a wide range of aryl and vinyl chlorides with aryl- and alkylzinc reagents. The process tolerates nitro groups, and it efficiently generates sterically hindered biaryls. In addition, a high turnover number (>3000) can be achieved.
Substituted and bridged pyridines useful as calcium channel blockers
申请人:Merck & Co., Inc.
公开号:US04599341A1
公开(公告)日:1986-07-08
Novel substituted and bridged pyridine compounds useful as calcium channel blockers, pharmaceutical compositions thereof, and methods of treatment are disclosed.