Double-Oxidative Dehydrogenative (DOD) [4 + 2]-Cyclization/Oxidative Aromatization Tandem Reaction of Glycine Derivatives with Ethylbenzenes
作者:Wei Jiang、Yajun Wang、Pengfei Niu、Zhengjun Quan、Yingpeng Su、Congde Huo
DOI:10.1021/acs.orglett.8b01941
日期:2018.8.3
structure formation. A Cu(II)/DDQ/O2 system-catalyzed DOD [4 + 2]-annulation/oxidative aromatization tandem reaction of readily available glycine derivatives and alkylbenzenes was established. This approach facilitates rapid access to a broad scope of substituted quinoline-2-carboxylate derivatives, an important motif in drug discovery. The reaction could feasibly be applied to a 10 gram-scale synthesis
双氧化脱氢(DOD)环化代表了最简单,最经济的环状结构形成方法之一。建立了Cu(II)/ DDQ / O 2系统催化的易得甘氨酸衍生物和烷基苯的DOD [4 + 2]环化/氧化芳构化串联反应。这种方法有助于快速获得广泛范围的取代的喹啉-2-羧酸衍生物,这是药物发现中的重要主题。该反应可以可行地应用于10克规模的合成。
Brønsted-Acid-Catalyzed Activation of Nitroalkanes: A Direct Enantioselective Aza-Henry Reaction
作者:Magnus Rueping、Andrey P. Antonchick
DOI:10.1021/ol8003589
日期:2008.5.1
A direct asymmetric organocatalytic aza-Henryreaction has been developed in which a new bifunctional Bronsted-acid-catalyzed activation of nitroalkanes provides an efficient access to alpha,beta-diamino acids with high dia- and enantioselectivities under mild and base-free reaction conditions.
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。
Tin powder‐promoted oxidation/allylation of glycine esters: Synthesis of
<i>γ</i>
,
<i>δ</i>
‐unsaturated
<i>α</i>
‐amino acid esters
作者:Pengfei Zhao、Danfeng Huang、Feng Wang、Tongyu Han、Ming Yang、Ke‐Hu Wang、Yulai Hu
DOI:10.1002/aoc.6479
日期:2022.1
An efficient tin powder-promoted oxidation/allylation reaction of glycine esters with allylbromides is developed, which affords γ,δ-unsaturated α-amino acid esters under mild conditions without any other transition metal catalysts. This method avoids the use of unstable imine as starting material, and provides an efficient method for synthesis of γ,δ-unsaturated α-amino acid esters and α-methylene-γ-lactam
Addition of α-bromoesters to azetidine-2,3-diones promoted by zinc-trimethylchlorosilane: a general synthesis of 3-trimethyisilyloxyazetidin-2-ones and α-alkylidene β-lactams.
作者:Claudio Palorno、Jesus M. Aizpurua、M. Concepción López、Natalia Aurrekoetxea、Mikel Oiarbide
DOI:10.1016/s0040-4039(00)97082-5
日期:1990.1
A convenient procedure for the preparation of a-alkylidene α-lactams from monocyclic azetidine-2,3-diones by means of the Reformatsky reaction is described.