visible-light-induced aerobic oxidative [2 + 3] cycloaddition reaction between glycine derivatives and styreneoxides has been disclosed that provides an efficient approach for the rapid synthesis of 1,3-oxazolidines under mild conditions. This photoinduced process is enabled by the formation of an electron donor-acceptor complex between glycine derivatives and benzyl iodides.
Double-Oxidative Dehydrogenative [4+2]-Cyclization/Dehydrogenation/Oxygenation Tandem Reaction of <i>N</i>-Arylglycine Derivatives with Cumenes
作者:Wei Jiang、Shuocheng Wan、Yingpeng Su、Congde Huo
DOI:10.1021/acs.joc.9b00506
日期:2019.6.21
most straightforward strategies for the synthesis of cyclic compounds. A novel approach to substituted 3,4-dihydroquinoline-3-one derivatives via a Cu(II)/DDQ/O2 system-catalyzed DOD [4+2]-cyclization/dehydrogenation/oxygenation cascade reaction of N-arylglycine derivatives, cumenes, and O2 has been developed.
双氧化脱氢(DOD)环化是合成环状化合物最直接的策略之一。通过Cu(II)/ DDQ / O 2系统催化的N-芳基甘氨酸衍生物枯烯的DOD [4 + 2]-环化/脱氢/加氧级联反应取代3,4-二氢喹啉-3-酮衍生物的新方法,并且已经开发了O 2。
TEMPO-Enabled Electrochemical Enantioselective Oxidative Coupling of Secondary Acyclic Amines with Ketones
作者:Zhen-Hua Wang、Pei-Sen Gao、Xiu Wang、Jun-Qing Gao、Xue-Tao Xu、Zeng He、Cong Ma、Tian-Sheng Mei
DOI:10.1021/jacs.1c08671
日期:2021.9.29
asymmetric coupling of secondary acyclic amines with ketonesvia a Shono-type oxidation has been described, affording the corresponding amino acid derivatives with good to excellent diastereoselectivity and enantioselectivity. The addition of an N-oxyl radical as a redox mediator could selectively oxidize the substrate rather than the product, although their oxidation potential difference is subtle (about
Oxidative Dehydrogenative [2 + 3]-Cyclization of Glycine Esters with Aziridines Leading to Imidazolidines
作者:Haitao Li、Songhai Huang、Yajun Wang、Congde Huo
DOI:10.1021/acs.orglett.7b03448
日期:2018.1.5
Oxidative dehydrogenative [2 + 3]-cyclization of glycine derivatives with N-sulfonylaziridines is described. A series of complex imidazolidines were produced under mild and simple reaction conditions. A mechanism involving an unusual acid-promoted auto-oxidation is proposed.
dehydrogenative formal [2 + 3] cyclization of glycine esters with α-angelicalactone has been accomplished via the synergistic combination of photoredox catalysis and acid catalysis. This protocol provides straightforward and facile access to a series of substituted γ-lactams at room temperature under an air atmosphere. Moreover, the reaction could be carried out on a gram scale. The mildconditions as well as the