Oxygen-Promoted Palladium(II) Catalysis: Facile C(sp2)−C(sp2) Bond Formation via Cross-Coupling of Alkenylboronic Compounds and Olefins
摘要:
Oxygen-promoted Pd(II) catalysis facilitated the synthesis of conjugated dienes; by cross-coupling of alkenylboronic compounds and various olefins including highly substituted alkenes and cyclohexenone. Under mild conditions, these versatile reactions were efficient and highly stereoselective.
A nordehydroabietyl amide-containing chiral diene for rhodium-catalysed asymmetric arylation to nitroolefins
作者:Ruikun Li、Zhongqing Wen、Na Wu
DOI:10.1039/c6ob02202b
日期:——
A highlyenantioselectiverhodium catalysed asymmetric arylation (RCAA) of nitroolefins with arylboronicacids is presented using a newly developed, C1-symmetric, non-covalent interacted, phellandrene derived, nordehydroabietyl amide-containing chiral diene under mild conditions. Stereoelectronic effects were studied, suggesting an activation of the bound substrate through the secondary amide as a
Nickel- or palladium-catalyzed cross coupling. 31. Palladium- or nickel-catalyzed reactions of alkenylmetals with unsaturated organic halides as a selective route to arylated alkenes and conjugated dienes: scope, limitations, and mechanism
作者:Eiichi Negishi、Tamotsu Takahashi、Shigeru Baba、David E. Van Horn、Nobuhisa Okukado
DOI:10.1021/ja00242a024
日期:1987.4
Al, Zr, and Zn were 2, 3, and > 2000 mmol of (E)-1-octenylbenzene (8) per mmol of Pd(PPh/sub3/)/sub 4/ per hour at room temperature, respectively. The stoichiometric reaction of PhPd(PPh/sub3/)/sub 2/I (6) with 1.2 equiv of (E)-1-octenylzinc chloride (7) in a 2:1 mixture of CD/sub 2/Cl/sub2/ and THF was examined in detail. The reaction follows second-order kinetics (k/sub2/ = 2.9 L/(mol.min) at
Oxidative Palladium(II) Catalysis: A Highly Efficient and Chemoselective Cross-Coupling Method for Carbon−Carbon Bond Formation under Base-Free and Nitrogenous-Ligand Conditions
作者:Kyung Soo Yoo、Cheol Hwan Yoon、Kyung Woon Jung
DOI:10.1021/ja063710z
日期:2006.12.1
For instance, oxidativepalladium(II) catalysis is effective with highly substituted alkenes and cyclic alkenes, which are known to be incompatible with other known catalytic conditions. Most examined reactions progressed smoothly to completion at low temperatures and in short times. These interesting results provide mechanistic insights and utilities for a new paradigm of palladium catalytic cycles
我们在此报告了氧促进 Pd(II) 催化的通用和温和协议的开发,导致烯基和芳基硼化合物与各种烯烃的选择性交叉偶联。与大多数交叉偶联反应不同,这种新方法即使在没有碱基的情况下也能很好地工作,因此避免了不需要的同源偶联。包括二甲基菲咯啉在内的基于氮的配体增强了反应性,并提供了一种高效的立体选择性方法来克服具有挑战性的底物限制。例如,氧化钯 (II) 催化对于高度取代的烯烃和环烯烃是有效的,已知它们与其他已知的催化条件不相容。大多数检查的反应在低温和短时间内顺利完成。
Enantioselective 1,6-Conjugate Addition to Cyclic Dienones Catalyzed by the Cu−DiPPAM Complex
In the presence of a Cu/DiPPAM catalytic system, various diorganozincreagents realize 1,6-asymmetric conjugate addition on various cyclic five- and six-membered cyclic dienones, with complete regioselectivity and high ee’s (93−99%).
Suzuki-type cross coupling reactions using palladium-water soluble catalyst. Synthesis of functionalized dienes
作者:Jean Pierre Geneˆt、Anders Linquist、Errol Blart、Virginie Mourie`s、Monique Savignac、Michel Vaultier
DOI:10.1016/0040-4039(95)00026-9
日期:1995.2
The palladium(0) catalyzed cross-coupling of boronicacids or esters conducted with a water soluble catalyst in the presence of organic base allows under mild condition the production of functionalized dienes. (60–90% yield).