Organocatalytic conjugate addition promoted by multi-hydrogen-bond cooperation: access to chiral 2-amino-3-nitrile-chromenes
作者:Wenjun Li、Jiayao Huang、Jian Wang
DOI:10.1039/c2ob27102h
日期:——
A new efficient enantioselective conjugate addition strategy has been disclosed to rapidly construct 2-amino-3-nitrile-chromene complexes via a multi-hydrogen-bond cooperative activation model.
Novel Synthesis of 2‐Oxo‐2H‐Benzopyrano[2,3‐d]Pyrimidines
作者:H. Turki、S. Abid、Y. Le Bigot、S. Fery‐Forgues、R. El Gharbi
DOI:10.1081/scc-200031013
日期:2004.1.1
Abstract The synthesis of novel substituted 3‐cyanoiminocoumarins and corresponding N‐ethoxycarbonyl iminocoumarins is described. The condensation of N‐ethoxycarbonyl‐3‐cyano‐7‐diethylamino iminocoumarin with amines as N‐nucleophiles yields substituted 2‐oxo‐2H‐benzopyrano‐[2,3‐d]pyrimidines having promising optical properties.
New HA 14-1 analogues: synthesis of 2-amino-4-cyano-4H-chromenes
作者:Leila Moafi、Somayeh Ahadi、Ayoob Bazgir
DOI:10.1016/j.tetlet.2010.09.090
日期:2010.12
The synthesis of 2-amino-4-cyano-4H-chromene derivatives as new HA 14-1 analogues by a simple and efficient method is reported. In addition, the reaction of 2-amino-2H-chromene-3-carbonitriles, salicylaldehydes and amines results in the formation of new chromeno[2,3-d]pyrimidine derivatives.
据报道,通过一种简单而有效的方法合成了2-氨基-4-氰基-4 H-色烯衍生物作为新的HA 14-1类似物。此外,2-氨基-2 H-亚甲基-3-腈,水杨醛和胺类的反应导致形成新的苯并[2,3- d ]嘧啶衍生物。
Synthesis of 2-Amino-4-(2-hydroxynaphthyl)-4H-chromene-3-carbonitriles by Michael Addition and Their Transformation into New Pentacyclic Compounds
作者:Lamia Dammak、Myriam Kammoun、Houcine Ammar、Souhir Abid、Rachid El Gharbi
DOI:10.1080/00397911.2014.924142
日期:2014.10.2
)-4H-chromene-3-carbonitriles were synthesized by Michael addition of various 3-cyanoiminocoumarins and β-naphthol in good yield. The heterocyclization of these materials in an acidic medium leads new heterocyclic compounds, which have not previously been described, in moderate to good yields and good selectivity. The synthesized compounds were characterized by infrared, 1H NMR, 13C NMR, two-dimensional
Synthesis of New Benzopyrano[2,3-c]pyrazoles and 3-triazolonyliminocoumarins From 3-cyano Iminocoumarin Derivatives
作者:S. Trichili、M. Kammoun、S. Abid、H. Ammar
DOI:10.1080/00397911.2014.903422
日期:2014.10.2
Abstract Synthesis of benzopyrano[2,3-c]pyrazoles and 3-triazolonyliminocoumarins was successfully performed using heterocyclization of 3-cyano iminocoumarin or their N-ethoxycarbonylated derivatives with semicarbazide reagents. Elemental analysis, infrared, and 1H NMR spectral data confirmed the molecular structure of the newly synthesized compounds. GRAPHICAL ABSTRACT