Nickel-Catalyzed <i>C</i>-Alkylation of Nitroalkanes with Unactivated Alkyl Iodides
作者:Sina Rezazadeh、Vijayarajan Devannah、Donald A. Watson
DOI:10.1021/jacs.7b04312
日期:2017.6.21
Enabled by nickel catalysis, a mild and general catalytic method for C-alkylation of nitroalkanes with unactivatedalkyliodides is described. Compatible with primary, secondary, and tertiary alkyliodides; and tolerant of a wide range of functional groups, this method allows rapid access to diverse nitroalkanes.
A metal‐free radical borylation of alkyl and aryl iodides with bis(catecholato)diboron (B2cat2) as the boron source under mild conditions is introduced. The borylation reaction is operationally easy to conduct and shows high functional group tolerance and broad substrate scope. Radical clock experiments and density functional theory calculations provide insights into the mechanism and rate constants
介绍了在温和条件下以双(儿茶酚)二硼(B 2 cat 2 )作为硼源对烷基碘化物和芳基碘化物进行金属自由基硼化反应。硼化反应操作简便,具有较高的官能团耐受性和广泛的底物范围。自由基时钟实验和密度泛函理论计算提供了对 B 2 cat 2的 C 自由基硼化的机制和速率常数的见解。
Enone construction: A silver‐mediated olefin acylation reaction is described, in which five‐, six‐, and ‐seven‐membered rings, tetrasubstituted olefins, bridged bicycles, spirocycles, and benzoxepinones are prepared. Highly selective intermolecular reactions are coupled to a Nazarov cyclization for the effective preparation of cyclopentenones, including the core of modhephene (see scheme).
A concisesynthesis of the tricyclo[4.3.1.03,7]decane caged core of palhinine alkaloids was developed with SmI2-mediated cyclization and light-initiated radical addition–fragmentation as key steps. Compared with the reported racemic routes which are all based on Diels–Alder-type key reactions, our strategy would be more readily accessible to the asymmetric total syntheses of the palhinine alkaloids
Exploratory studies of the transition metal catalyzed intramolecular cyclization of unsaturated .alpha.,.alpha.-dichloro esters, acids, and nitriles
作者:Thomas K. Hayes、Rosanna. Villani、Steven M. Weinreb
DOI:10.1021/ja00224a043
日期:1988.8
Une methode de synthese generale de systemes cycliques carbones, fonctionnalises a ete developpee sur la base de cyclisations radicalaires intramoleculaires decomposescarbonyles dichloro-2,2 ethyleniques et acetyleniques, catalysees par des complexes du fer ou du ruthenium
Une methode de synthese generale de systemes cycliques carbones, fonctionnalises a ete developpee sur la base de cyclisationsradicalaires intramoleculaires de composes carbonyles dichloro-2,2 etheniques et acetyleniques, catalysees par des complexes du fer ou du ruthenium