Chemoselective Homologation–Deoxygenation Strategy Enabling the Direct Conversion of Carbonyls into (<i>n+1</i>)-Halomethyl-Alkanes
作者:Margherita Miele、Andrea Citarella、Thierry Langer、Ernst Urban、Martin Zehl、Wolfgang Holzer、Laura Ielo、Vittorio Pace
DOI:10.1021/acs.orglett.0c02831
日期:2020.10.2
The sequential installation of a carbenoid and a hydride into a carbonyl, furnishing halomethyl alkyl derivatives, is reported. Despite the employment of carbenoids as nucleophiles in reactions with carbon-centered electrophiles, sp3-type alkyl halides remain elusive materials for selective one-carbon homologations. Our tactic levers on using carbonyls as starting materials and enables uniformly high
Copper-catalyzed carbochlorination or carbobromination via radical cyclization of aryl amines
作者:Jianing Ouyang、Xiaolong Su、Yu Chen、Yaofeng Yuan、Yi Li
DOI:10.1016/j.tetlet.2016.02.054
日期:2016.3
A copper-catalyzed radical carbochlorination or carbobromination is reported. Intramolecular cyclization occurred through aryl radicals generated in situ from bench-stable aryl amines with aqueous hydrogen halides as the halogen sources. A variety of (3-halomethyl)-1,2-dihydrobenzofuran derivatives were prepared in up to 92% yield through this one-pot protocol utilizing widely available starting materials