Oxone® (2KHSO5·KHSO4·K2SO4) was used to promote the nitration of alkenes and alkynes with sodium nitrite (NaNO2) and potassium iodide (KI). This stable, easy-to-handle, and environmentally benign oxidant was used under mild conditions (room temperature) and provided short reaction times. Styrene derivatives that did not contain electron-donating groups afforded the corresponding nitro alkenes in moderate
Geometrically Selective Denitrative Trifluoromethylthiolation of β-Nitrostyrenes with AgSCF<sub>3</sub> for (<i>E</i>)-Vinyl Trifluoromethyl Thioethers
作者:Changge Zheng、Shuai Huang、Yang Liu、Chao Jiang、Wei Zhang、Ge Fang、Jianquan Hong
DOI:10.1021/acs.orglett.0c01714
日期:2020.6.19
An efficient copper(II)-promoted denitrative trifluoromethylthiolation under mild reaction conditions has been developed for vinyl trifluoromethyl thioethers to construct Cvinyl–SCF3 bonds with stable AgSCF3 as a source of the trifluoromethylthio. This reaction system tolerates a broad range of functional groups to commendably achieve a high product yield and excellent stereoselectivity of E/Z.
Metal-free radical trifluoromethylation of β-nitroalkenes through visible-light photoredox catalysis
作者:Siba P. Midya、Jagannath Rana、Thomas Abraham、Bhaskaran Aswin、Ekambaram Balaraman
DOI:10.1039/c7cc02589k
日期:——
efficient catalytic conversion of nitroalkenes to highly stereoselective 1-trifluoromethylalkenes at room temperature. This unprecedented metal-free photocatalytic strategy is simple and operates under visible-light irradiation using the commercially available CF3 source.
A Reagent-Controlled Phospha-Michael Addition Reaction of Nitroalkenes with Bifunctional N-Heterocyclic Phosphine (NHP)-Thioureas
作者:Hai Huang、Jake Palmas、Jun Yong Kang
DOI:10.1021/acs.joc.6b02490
日期:2016.12.2
phospha-Michael addition reaction of nitroalkenes to afford diversely substituted β-nitrodiazaphosphonates. This transformation takes place at room temperature under catalyst-free conditions and exhibits broad functionalgroup tolerance. The key to success in catalyst, additive-free reaction conditions is the suitable hydrogen-bond activation of the nitro group by a Brønsted acid (thiourea), which
Convenientmethod for preparation of 1,2-diamine from the corresponding nitroolefin was established by successive reactions of Michael addition of O-ethylhydroxylamine to nitroolefin and reduction ...