Silver-promoted (radio)fluorination of unsaturated carbamates via a radical process
作者:Bin Yang、Kantapat Chansaenpak、Hongmiao Wu、Lin Zhu、Mengzhe Wang、Zibo Li、Hongjian Lu
DOI:10.1039/c7cc01393k
日期:——
The intramolecular fluorocyclization of unsaturated carbamates proceeds via a cyclization/1,2-(hetero)aryl migration/fluorination cascade involving an unusual radical process, and provides a straightforward access to (radio)fluorinated oxazolidin-2-ones, oxazolidine-2,4-diones and 1,3-oxazinan-2-ones.
A Simple, Broad-Scope Nickel(0) Precatalyst System for the Direct Amination of Allyl Alcohols
作者:Joseph B. Sweeney、Anthony K. Ball、Philippa A. Lawrence、Mackenzie C. Sinclair、Luke J. Smith
DOI:10.1002/anie.201805611
日期:2018.8.6
inexpensive NiII/Zn couple enables the allylation of primary, secondary, and electron‐deficient amines without the need for glove‐box techniques. Under mild conditions, primary and secondary aliphatic amines react smoothly with a range of allyl alcohols, giving secondary and tertiaryaminesefficiently. This “totally catalytic” method can also be applied to electron‐deficient nitrogen nucleophiles; the
Amines reacted with primary alcohols in the presence of a platinum complex catalyst at 120–180 °C to give N-alkylated or N-allylated compounds.
在120-180°C下,胺类在铂络合物催化剂的存在下与伯醇反应,生成N-烷基化或N-烯丙基化产物。
Palladium-catalyzed oxidative arylacetoxylation of alkenes: synthesis of indole and indoline derivatives
作者:Shuklachary Karnakanti、Zhong-Lin Zang、Sheng Zhao、Pan-Lin Shao、Ping Hu、Yun He
DOI:10.1039/c7cc06448a
日期:——
A method for oxidative arylacetoxylation of alkenes has been developed to synthesize indole and indoline derivatives from readily accessible substrates. The cinnamyl tethered anilines with picolinamide as a directing group provided 3-substituted indoles via intramolecular oxidative arylacetoxylation, and the 2-methyl substituted cinnamyl anilines furnished indoline derivatives with 3-position quaternary
mechanistic investigations, including (1)H and (31)P(1)H} NMR studies; isolation and characterization of several catalytic intermediates, Pt(xantphos)Cl(2), Pt(eta(2)-C(3)H(5)OH)(xantphos), etc; confirmation of the structure of [Pt(eta(3)-allyl)(xantphos)]OTf by X-ray crystallographic analysis; and crossover experiments, suggested that formation of the pi-allylplatinum complex through the elimination of water