Pd-Catalyzed Intramolecular Aminoalkylation of Unactivated Alkenes: Access to Diverse <i>N</i>-Heterocycles
作者:Liu Ye、Kai-Yip Lo、Qiangshuai Gu、Dan Yang
DOI:10.1021/acs.orglett.6b03295
日期:2017.1.20
A highly efficient palladium-catalyzedintramolecular aminoalkylation of unactivatedalkenes in the absence of an external ligand and oxidant is described. New C–N and C(sp3)–C(sp3) bonds are formed simultaneously. This general transformation allows for construction of diverse N-heterocycles. Mechanistic studies show that the process may involve a four-membered Pd(alkyl)amido intermediate.
Oxidative Diamination of Alkenes with Ureas as Nitrogen Sources: Mechanistic Pathways in the Presence of a High Oxidation State Palladium Catalyst
作者:Kilian Muñiz、Claas H. Hövelmann、Jan Streuff
DOI:10.1021/ja075041a
日期:2008.1.1
identical mechanism where stereochemistry is concerned. It exemplifies the importance of cationic palladium(IV) intermediates prior to the final reductiveeliminationfrom palladium and proves that the nucelophile for this step stems from the immediate coordination sphere of the palladium(IV) precursor. These results have important implications for the general development of alkene 1,2-difunctionalization
Synthesis of Functionalized Indoles via Palladium-Catalyzed Aerobic Cycloisomerization of <i>o</i>-Allylanilines Using Organic Redox Cocatalyst
作者:Xiao-Shan Ning、Mei-Mei Wang、Jian-Ping Qu、Yan-Biao Kang
DOI:10.1021/acs.joc.8b01999
日期:2018.11.2
A scalable and practical synthesis of functionalized indoles via Pd-tBuONO cocatalyzed aerobic cycloisomerization of o-allylanilines is reported. Using molecular oxygen as a terminal oxidant, a series of substituted indoles were prepared in moderate to good yields. The avoidance of hazardous oxidants, heavy-metal cocatalysts, and high boiling point solvents such as DMF and DMSO enables this method
报道了通过Pd- t BuONO共催化邻烯丙基苯胺的好氧环异构化可规模化和实用地合成官能化的吲哚。使用分子氧作为末端氧化剂,以中等至良好的产率制备了一系列取代的吲哚。避免使用有害的氧化剂,重金属助催化剂和高沸点溶剂(例如DMF和DMSO),可使该方法应用于药物合成。吲哚美辛的实用克级合成证明了其应用潜力。
Palladium-catalyzed selective aminoamidation and aminocyanation of alkenes using isonitrile as amide and cyanide sources
作者:Huanfeng Jiang、Hanling Gao、Bifu Liu、Wanqing Wu
DOI:10.1039/c4cc07743a
日期:——
An efficient aminoamidation and aminocyanation reaction of alkenes has been developed for the synthesis of substituted indolines, tetrahydroisoquinolines and pyrrolidines.
已开发出一种高效的烯烃氨酰化和氨基氰化反应,用于合成取代吲哚烷、四氢异喹啉和吡咯烷。
Copper Catalyzed Enantioselective Intramolecular Aminooxygenation of Alkenes
作者:Peter H. Fuller、Jin-Woo Kim、Sherry R. Chemler
DOI:10.1021/ja806585m
日期:2008.12.31
methyleneoxy-functionalized dihydroindolines and pyrrolidines. Tetramethylaminopyridyl radical (TEMPO) serves as both the source of the oxygen and the stoichiometric oxidant. These reactions are catalyzed by copper(II) triflate, complexed with (4S,5R)-Bis-Phbox. The unprotected aminoalcohols can be obtained by sequential dissolving metal reductions of the N-S and O-N bonds.
本文报道了铜催化的烯烃的对映选择性分子内氨基氧化。这是对映选择性分子内烯烃氨基氧化过程的第一份报告。N-Arylsulfonyl-2-allylanilines 和 4-pentenylarylsulfonamides 以高产率和良好的对映选择性环化,提供新的手性亚甲氧基官能化二氢二氢吲哚和吡咯烷。四甲基氨基吡啶基(TEMPO)既是氧源又是化学计量氧化剂。这些反应由与 (4S,5R)-Bis-Phbox 络合的三氟甲磺酸铜 (II) 催化。未保护的氨基醇可以通过连续溶解 NS 和 ON 键的金属还原来获得。