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.
Synthesis of β-Functionalized α,β-Unsaturated Oximes via Silylation of Nitro Compounds
作者:Vitaly M. Danilenko、Alexander A. Tishkov、Sema L. Ioffe、Ilya M. Lyapkalo、Yury A. Strelenko、Vladimir A. Tartakovsky
DOI:10.1055/s-2002-23539
日期:——
A general method for the synthesis of conjugated enoximes 2 via silylation of functionalized aliphatic nitrocompounds 1 has been claborated. The configuration of obtained products has been determined by NMR spectroscopy.
[EN] A PROCESS FOR MAKING 2-NITRO-1-ETHANOL DERIVATIVES<br/>[FR] PROCÉDÉ DE FABRICATION DE DÉRIVÉS DE 2-NITRO-1-ÉTHANOL
申请人:ANGUS CHEMICAL
公开号:WO2012138494A1
公开(公告)日:2012-10-11
A process for making a 2-nitro-1-ethanol derivative of formula III: wherein R3 is as described herein is provided. Novel 2-nitro-1-ethanol derivatives provided.
作者:Raphael S. Kim、Linh V. Dinh-Nguyen、Kirk W. Shimkin、Donald A. Watson
DOI:10.1021/acs.orglett.0c03061
日期:2020.10.16
copper catalyst system, an efficient α-functionalization of nitroalkanes with propargyl bromides is now established. This mild and robust method is highly functional group tolerant and provides straightforward access to complex secondary and tertiary homopropargylic nitroalkanes. Moreover, the utility of these α-propargylated nitroalkanes is demonstrated through downstream functionalization to biologically
Herein, by exploiting different activation modes of fluoroamides, we achieved α- and δ-C(sp3)–H alkylation of nitroalkanes with switchable regioselectivity. Cu catalysis enabled the interception of a distal C-centered radical by a N-centered radical to couple nitroalkanes and unactivated δ-C–H bonds. In addition, imines generated in situ by fluoroamides were trapped by nitroalkanes to realize the α-C–H
在此,通过利用氟酰胺的不同活化模式,我们实现了具有可切换区域选择性的硝基烷烃的α-和δ-C(sp 3 )–H烷基化。Cu 催化作用使得以 N 为中心的自由基拦截远端以 C 为中心的自由基,从而偶联硝基烷烃和未活化的 δ-C-H 键。此外,氟酰胺原位生成的亚胺被硝基烷烃捕获,实现酰胺的α-C-H烷基化。这两种可扩展的协议都具有广泛的底物范围和良好的官能团耐受性。