Fluoroalkyl sulfides as photoredox-active coupling reagents for alkene difunctionalization
作者:Mikhail D. Kosobokov、Mikhail O. Zubkov、Vitalij V. Levin、Vladimir A. Kokorekin、Alexander D. Dilman
DOI:10.1039/d0cc04617e
日期:——
A visible-light-promoted fluoroalkylation-thiolation of alkenes is described. A 4-tetrafluoropyridinylthio fragment serves as a photoredox-active group in the initiation step and undergoes a radical group transfer, which is important for the reaction efficiency. In the primary products, the pyridinylthio substituent may be further functionalized via radical processes or an aromatic substitution reaction
Synthesis of 2-(halomethyl)-3,4-dihydro-2H-pyrido[2,1-b][1,3]oxazinium halides
作者:E. V. Kalita、D. G. Kim
DOI:10.1134/s1070428017070132
日期:2017.7
Alkylation of pyridin-2(1H)-one and 5-nitropyridin-2(1H)-one with 4-bromobut-1-ene afforded a mixture of N- and O-butenyl derivatives. 1-(But-3-en-1yl)pyridin-2(1H)-one and 1-(but-3-en-1-yl)-5-nitropyridin- 2(1H)-one reacted with bromine and iodine to give 2-(halomethyl)-3,4-dihydro-2H-pyrido[2,1-b][1,3]-oxazinium halides.