Suzuki–Miyaura Cross-Coupling of Heteroaryl Halides and Arylboronic Acids in Continuous Flow
作者:Timothy Noël、Andrew J. Musacchio
DOI:10.1021/ol202052q
日期:2011.10.7
General continuous-flow conditions for the Suzuki–Miyauracross-coupling of heteroaryl halides and (hetero)arylboronicacids have been developed. A wide range of heterobiaryl products is obtained in excellent yields (20 examples) employing low catalyst loadings (0.05–1.5 mol % Pd).
Accelerating Palladium-Catalyzed CF Bond Formation: Use of a Microflow Packed-Bed Reactor
作者:Timothy Noël、Thomas J. Maimone、Stephen L. Buchwald
DOI:10.1002/anie.201104652
日期:2011.9.12
A flow process for Pd‐catalyzed CFbondformation is described. A microreactor with a packed‐bed design allows for easy handling of large quantities of insoluble CsF with precise control over reaction times, efficient mixing, and the ability to safely handle elevated temperatures and pressures. A variety of aryl triflates, including heteroaryl ones, were converted into aryl fluorides in short reaction
描述了 Pd 催化的C F 键形成的流动过程。具有填充床设计的微反应器可以通过精确控制反应时间、有效混合以及安全处理高温和高压的能力轻松处理大量不溶性 CsF。各种芳基三氟甲磺酸酯,包括杂芳基三氟甲磺酸酯,在很短的反应时间内被转化为芳基氟化物(参见方案)。
A Fluorinated Ligand Enables Room-Temperature and Regioselective Pd-Catalyzed Fluorination of Aryl Triflates and Bromides
作者:Aaron C. Sather、Hong Geun Lee、Valentina Y. De La Rosa、Yang Yang、Peter Müller、Stephen L. Buchwald
DOI:10.1021/jacs.5b09308
日期:2015.10.21
A new biaryl monophosphine ligand (AlPhos, L1) allows for the room-temperature Pd-catalyzed fluorination of a variety of activated (hetero)aryl trifiates. Furthermore, aryl triflates and bromides that are prone to give mixtures of regioisomeric aryl fluorides with Pd-catalysis can now be converted to the desired aryl fluorides with high regioselectivity. Analysis of the solid-state structures of several Pd(II) complexes, as well as density functional theory (DFT) calculations, shed light on the origin of the enhanced reactivity observed with L1.