Pd/Cu-Cocatalyzed Aerobic Oxidative Carbonylative Homocoupling of Arylboronic Acids and CO: A Highly Selective Approach to Diaryl Ketones
作者:Long Ren、Ning Jiao
DOI:10.1002/asia.201402326
日期:2014.9
A highlyselectivePd/Cu‐cocatalyzed aerobicoxidativecarbonylativehomocoupling of arylboronicacids has been developed. This method employs a simple catalytic system, readily available boronic acids as the substrates, molecular oxygen as the oxidant, and 1 atm of CO/O2, which makes this method practical for further applications.
已经开发出高选择性的Pd / Cu催化的芳基硼酸好氧氧化羰基均偶联剂。该方法采用简单的催化系统,以容易获得的硼酸为底物,以分子氧作为氧化剂,并使用1 atm的CO / O 2,这使该方法可用于进一步的应用。
Preparation of Polystyrene Beads with Dendritically Embedded TADDOL and Use in EnantioselectiveLewis Acid Catalysis
of TADDOLates, which are dendritically incorporated in polystyrene beads (Scheme 1). A series of styryl-substituted TADDOLs with flexible, rigid, or dendritically branching spacers between the TADDOL core and the styryl groups (2–16 in number) has been prepared (5–7, 20, 21, 26 in Schemes 2–4 and Fig. 1–3). These were used as cross-linkers in styrene-suspension polymerization, leading to beads of ca
Symmetrical diaryl ketones were prepared by a cross-coupling reaction between aryl bromides and ethyl chloroformate. This new method, which uses a catalyst composed of CoBr2 and a bipyridine ligand along with readily available starting materials, allows for the synthesis of a variety of symmetrical diaryl ketones in moderate to excellent yields (37–99 %) under mild conditions. This reaction, in which
Disclosed is a complex for providing nucleic acid expression in a cell. A polynucleotide and a polymer are mixed together to form the complex wherein the zeta potential of the complex is not positive. Then the complex is delivered to the cell wherein the nucleic acid is expressed.
Disclosed is a system for providing nucleic acid expression in a cell. A polynucleotide is inserted into a mammalian vasculature. The vessel permeability is increased and the polynucleotide is delivered to the cell where it enhances the endogenous properties of the cell.