Synthesis of β-Methylsulfonylated N-Heterocycles from Saturated Cyclic Amines with the Insertion of Sulfur Dioxide
作者:Yan He、Jintao Yang、Qimeng Liu、Xinying Zhang、Xuesen Fan
DOI:10.1021/acs.joc.0c02368
日期:2020.12.4
An efficient synthesis of β-methylsulfonylated N-heterocycles via FeCl3-catalyzed C(sp3)–H dehydrogenation and C(sp2)–H methylsulfonylation of inactivated cyclic amines with the promotion and participation of inorganic sodium metabisulfite and dicumyl peroxide (DCP) has been developed. Notably, bifunctional DCP acted not only as an oxidant to promote the dehydrogenation but also as a methyl radical
was designed and synthesized by introducing the dye photocatalyst thioxanthenone into ionicliquids and its excellent photocatalytic performance was demonstrated by photophysical and electronic performance tests. The IL-TX was applied as a recyclable photocatalyst for α-cyanidation reaction of aromatic tertiary amines in MeOH at room temperature under blue light irradiation, and a range of cyanide products
Selective synthesis of β-nitrated N-heterocycles and <i>N</i>-nitroso-2-alkoxyamine aldehydes from inactivated cyclic amines promoted by <sup>t</sup>BuONO and oxoammonium salt
作者:Yan He、Zhi Zheng、Yajie Liu、Jiajie Qiao、Xinying Zhang、Xuesen Fan
DOI:10.1039/c9cc05963f
日期:——
A convenient synthesis of β-nitrated tetrahydropyridines has been successfully realized via dehydrogenative β-C–H nitrification of N-arylpiperidines promoted by tBuONO and the oxoammonium salt in THF. In addition, changing the solvent to an acetone/water mixture resulted in selective cleavage and tunable functionalization of the inert C–N bonds in cyclic amines to afford N-nitroso chain 2-alkoxyamine
Parameterization of Arynophiles: Experimental Investigations towards a Quantitative Understanding of Aryne Trapping Reactions
作者:Theresa M. McCormick、David R. Stuart、Bryan E. Metze、Avik Bhattacharjee
DOI:10.1055/a-1845-3066
日期:2022.11
Arynes are highly reactive intermediates that may be used strategically in synthesis by trapping with arynophilic reagents. However, ‘arynophilicity’ of such reagents is almost completely anecdotal and predicting which ones will be efficient traps is often challenging. Here, we describe a systematic study to parameterize the arynophilicity of a wide range of reagents known to traparynes. A relative