The First General and Selective Palladium(II)-Catalyzed Alkoxycarbonylation of Arylboronates: Interplay among Benzoquinone-Ligated Palladium(0) Complex, Organoboron, and Alcohol Solvent
作者:Yoshihiko Yamamoto
DOI:10.1002/adsc.200900836
日期:2010.2.15
Methoxycarbonylation of aryl- and alkenylboron compounds was performed using the palladium(II) acetate/triphenylphosphine [Pd(OAc)2/PPh3] catalyst with p-benzoquinone as a stoichiometric oxidant in methanol at ambient temperature to obtain the corresponding methyl esters in good yields. A wide variety of functional groups including various carbonyl functionalities, nitrile, nitro, sulfone, and unprotected
Radical C(sp<sup>2</sup>)–H Trifluoromethylation of Aldehydes in Aqueous Solution
作者:Pei Zhang、Haigen Shen、Lin Zhu、Weiguo Cao、Chaozhong Li
DOI:10.1021/acs.orglett.8b03012
日期:2018.11.16
The copper-mediated C(sp2)–H trifluoromethylation of aldehydes is described. The reaction of aldehydes with (bpy)Cu(CF3)3, Et3SiH, and K2S2O8 in aqueous acetone at room temperature provides the corresponding trifluoromethyl ketones in satisfactory yields. The protocol is applicable to both aliphatic and aromatic aldehydes and exhibits a broad substrate scope and wide functional group compatibility
描述了铜介导的醛的C(sp 2)–H三氟甲基化。在室温下,醛与(bpy)Cu(CF 3)3,Et 3 SiH和K 2 S 2 O 8在丙酮水溶液中的反应以令人满意的产率提供了相应的三氟甲基酮。该协议适用于脂族和芳族醛,并具有广泛的底物范围和广泛的官能团相容性。提出了一种涉及Cu(II)介导的酰基三氟甲基化的机理。
Procatalysts, catalyst systems, and use in olefin polymerization
申请人:——
公开号:US20010025005A1
公开(公告)日:2001-09-27
There are described solid procatalysts, catalyst systems incorporating the solid procatalysts, and the use of the catalyst systems in olefin polymerization and interpolymerization.
本文介绍了固体原催化剂、含有固体原催化剂的催化剂体系以及催化剂体系在烯烃聚合和互聚中的应用。
Procatalysts, catalyst systems, and use in OLEFIN polymerization
申请人:——
公开号:US20010029286A1
公开(公告)日:2001-10-11
There are described solid procatalysts, catalyst systems incorporating the solid procatalysts, and the use of the catalyst systems in olefin polymerization and interpolymerization.