Catalytic Asymmetric Decarboxylative Mannich Reaction of Malonic Acid Half Esters with Cyclic Aldimines: Access to Chiral β-Amino Esters and Chroman-4-amines
作者:Chun-Man Jia、Heng-Xia Zhang、Jing Nie、Jun-An Ma
DOI:10.1021/acs.joc.6b01750
日期:2016.9.16
An enantioselective decarboxylative Mannich reaction of malonicacid half esters (MAHEs) with cyclic aldimines has been accomplished by employing the copper(I)/(R,R)-Ph-Box complex as chiral catalyst. The desired β-amino esters were obtained in good to high yields with excellent enantioselectivities. Furthermore, one of the corresponding Mannich products could be readily transformed into chiral chroman-4-amines
Highly Enantioselective Decarboxylative Mannich Reaction of Malonic Acid Half Oxyesters with Cyclic Trifluoromethyl Ketimines: Synthesis of β-Amino Esters and Anti-HIV Drug DPC 083
作者:Hai-Na Yuan、Shen Li、Jing Nie、Yan Zheng、Jun-An Ma
DOI:10.1002/chem.201303307
日期:2013.11.18
An organocatalyticenantioselectivedecarboxylative Mannich reaction of malonicacidhalf oxyesters with cyclic ketimines was developed for the preparation of enantioenriched β‐amino esters with a quaternary stereogenic center and the anti‐HIV drug DPC 083 (see scheme).
Enantioselective Construction of Amino Carboxylic‐Phosphonic Acid Derivatives Enabled by Chiral Amino Thiourea‐Catalyzed Decarboxylative Mannich Reaction
作者:Xue‐Qi Wang、Fang‐Fang Feng、Jing Nie、Fa‐Guang Zhang、Jun‐An Ma
DOI:10.1002/adsc.202200306
日期:2022.6.7
An asymmetric decarboxylativeMannichreaction of phosphonate sultam-ketimines with malonic acid half esters is developed enabled by saccharide-derived bifunctional amino thiourea catalysis. This protocol provides access to a broad range of α-amino-β-carboxylic phosphonates featuring the N,P-containing tetrasubstituted stereocenters with 78–99% ee. Further synthetic derivatizations could allow the
通过糖衍生的双功能氨基硫脲催化,开发了膦酸磺胺酮亚胺与丙二酸半酯的不对称脱羧曼尼希反应。该协议提供了广泛的 α-氨基-β-羧酸膦酸盐,具有 78–99% ee 的含N、P的四取代立体中心。进一步的合成衍生化可以允许将酰胺、醇和氮杂环丁烷支架引入核心结构。
Malonic Acid Half Oxyesters and Thioesters: Solvent-Free Synthesis and DFT Analysis of Their Enols
作者:Sean P. Bew、G. Richard Stephenson、Jacques Rouden、Luis A. Martinez-Lozano、Haseena Seylani
DOI:10.1021/ol400804b
日期:2013.8.2
A much improved synthetic route to malonic acid half thioesters (MAHTs) and oxyesters (MAHOs), the easy incorporation of deuterium labeling expecially in MAHTs, and an unexpectedly large difference in enolization chemistry between MAHTs and MAHOs are reported. Density functional theory calculations explore the origins of this difference and identify an additional MAHT molecular orbital which increases delocalization between sulfur and the enol in both cisoid and transoid forms.
Eine einfache Synthese von Malonsäure-mono- und -bis-phenylestern<sup>1</sup>