of a practical and direct trifluoromethylthiolation reaction of unactivated aliphaticCH bonds employs a silver‐based reagent. The reaction is operationally simple, scalable, and proceeds under aqueous conditions in air. Furthermore, its broad scope and good functional‐group compatibility were demonstrated by applying this method to the selective trifluoromethylthiolation of natural products and natural‐product
Radical Transformation of Aliphatic C–H Bonds to Oxime Ethers via Hydrogen Atom Transfer
作者:Xinmou Wang、Mo Yu、Hongjian Song、Yuxiu Liu、Qingmin Wang
DOI:10.1021/acs.orglett.1c03087
日期:2021.11.5
we describe a strategy for conversion of aliphatic C–H bonds to oxime ethers viahydrogen atom transfer. In this strategy, the decatungstate anion and sulfate radical play complementary roles in the abstraction of hydrogen atoms from primary, secondary, and tertiary C–H bonds of alkanes. The easy accessibility of alkanes and the broad substrate scope, mild conditions, and excellent regioselectivity
Site-Selective Direct C–H Pyridylation of Unactivated Alkanes by Triplet Excited Anthraquinone
作者:Wooseok Lee、Sungwoo Jung、Minseok Kim、Sungwoo Hong
DOI:10.1021/jacs.1c00549
日期:2021.2.24
functionalization in chemical feedstocks is a challenging and useful reaction in the broad field of chemical research. Here, we report a modular photochemical platform for the site-selective C–H pyridylation of unactivated hydrocarbons via the unique synergistic effects of triplet excited anthraquinone and an amidyl radical-based reverse hydrogen atom transfer (RHAT) agent. The selective pyridylation of tertiary and
Regioselectivity in the ring opening of 2-phenyl-1,3-dioxan-2-yl radicals derived from cyclic benzylidene acetals and comparison with deoxygenation of a carbohydrate diol via its cyclic thionocarbonate
作者:Brian P Roberts、Teika M Smits
DOI:10.1016/s0040-4039(01)00540-8
日期:2001.5
Ring-opening β-scission of monocyclic 2-phenyl-1,3-dioxan-2-yl radicals gives preferentially the more stabilised alkyl radical. However, analogous bicyclic radicalsderived from two 4,6-O-benzylidene glucopyranosides afford primary radicals in preference to secondary radicals, a result that can be rationalised with the aid of DFT calculations. The report by Barton and Subramanian, that the opposite