β-Cyclodextrin/IBX in water: highly facile biomimetic one pot deprotection of THP/MOM/Ac/Ts ethers and concomitant oxidative cleavage of chalcone epoxides and oxidative dehydrogenation of alcohols
作者:Sumit Kumar、Naseem Ahmed
DOI:10.1039/c5gc01785h
日期:——
A mild and efficient one-pot deprotection of THP/MOM/Ac/Ts ethers and concomitant oxidative cleavage of epoxides and oxidative dehydrogenation of alcohols to form [small beta]-hydroxy 1, 2 diketones, 1, 2, 3 triketones...
对THP / MOM / Ac / Ts醚进行温和有效的一锅脱保护,并进行环氧化物的氧化裂解和醇的氧化脱氢反应,形成[小β-羟基1,2,2二酮,1,2,3三酮...
A nickel precatalyst for efficient cross-coupling reactions of aryl tosylates with arylboronic acids: vital role of dppf
作者:Feng Hu、Xiangyang Lei
DOI:10.1016/j.tet.2014.04.059
日期:2014.6
An air-stable and easy-to-handle nickelprecatalyst, (9-phenanthrenyl)Ni(II)(PPh3)2Cl, was examined for the cross-couplingreactions of aryl tosylates with arylboronic acids. Under the optimized reaction conditions, the catalytic system tolerates a wide range of activated, neutral and deactivated substrates. The selectivity of this cross-couplingreaction towards aryl tosylates and arylboronic acids
N-Heterocyclic Carbene Derived Nickel-Pincer Complexes: Efficient and Applicable Catalysts for Suzuki-Miyaura Coupling Reactions of Aryl/Alkenyl Tosylates and Mesylates
作者:Jun-ichi Kuroda、Kiyofumi Inamoto、Kou Hiroya、Takayuki Doi
DOI:10.1002/ejoc.200900067
日期:2009.5
activities of NHC-derived nickel–pincercomplexes for the Suzuki–Miyauracouplingreactions of aryl/alkenyltosylates and mesylates are described. In the presence of a catalytic amount of nickelacycle 1a, a wide array of tosylates and mesylates reacted with several aryl- and alkenylboronic acids to afford the coupling products, generally in high yields. Fine tuning of the reaction conditions for each class
Retraction: Suzuki-Miyaura Coupling of Aryl Tosylates and Mesylates in Water
作者:Jan Pschierer、Herbert Plenio
DOI:10.1002/ejoc.201000251
日期:2010.5
fluorenylphosphane (cataCXium Fsulf) enables thefacile Suzuki–Miyauracoupling of various (heterocyclic) aryl tosylates and aryl mesylate with various (heterocyclic) boronic acids in excellent yields (> 95 %) using water as the reaction solvent. Retraction: The following article from the European Journal of Organic Chemistry, “Suzuki–MiyauraCoupling of Aryl Tosylates and Mesylates in Water”, published online on
水溶性磺化芴基磷烷 (cataCXium Fsulf) 的钯配合物 (0.5 mol-%) 使各种(杂环)芳基甲苯磺酸酯和甲磺酸芳基酯与各种(杂环)硼酸以优异的产率(> 95 %)进行轻松的 Suzuki-Miyaura 偶联) 使用水作为反应溶剂。撤回:以下文章来自欧洲有机化学杂志,“Suzuki-Miyaura Coupling of Aryl Tosylates and Mesylates in Water”,于 2010 年 4 月 15 日在线发表于 Wiley 在线图书馆(www.onlinelibrary.wiley.com,doi:10.1002 /ejoc.201000251) 和印刷中 (Eur. J. Org. Chem.2010, 2934–2937),经通讯作者、期刊编辑、Haymo Ross 博士和 Wiley-VCH 同意撤回。由于手稿中列出的几个 1H 和 13C
C−C Bond Formation Catalyzed Heterogeneously by Nickel-on-Graphite (Ni/C<sub>g</sub>)
作者:Bruce H. Lipshutz、Tom Butler、Elizabeth Swift
DOI:10.1021/ol702453q
日期:2008.3.1
Inexpensive nickel(II) mounted on graphite (Ni/Cg) can be easily activated and used to heterogeneously catalyze cross-couplings involving aryl halides/tosylates with boronic acids, vinylalanes, and vinylzirconocenes. Comparisons are made with the charcoal analogue, Ni/C, and some unusual chemoselectivities between these catalysts have been uncovered.