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
N-Heterocyclic carbene-catalysed homoenolate addition reaction to 3-cyano-2-imino-2<i>H</i>-chromenes: synthesis of C<sub>4</sub>-functionalized 2-amino-3-cyano-4<i>H</i>-chromene
作者:Pushpendra Mani Shukla、Aniruddh Pratap、Biswajit Maji
DOI:10.1039/d2ob01447e
日期:——
A diastereoselective N-heterocyclic carbene-catalysed reaction between enal and 3-cyano-2-imino-2H-chromene is described for accessing a new type of C4-functionalized 2-amino-3-cyano-4H-chromene. A wide variety of enals and iminochromenes afforded the desired homoenolate addition product 2-amino-4H-chromenes in good yields and with moderate to good diastereoselectivities.
描述了烯醛和 3-cyano-2-imino-2 H -chromene之间的非对映选择性 N-杂环卡宾催化反应以获得新型 C 4 -功能化 2-amino-3-cyano-4 H -chromene。各种各样的烯醛和亚氨基色烯以良好的产率和中等至良好的非对映选择性提供所需的均烯醇化物加成产物 2-amino-4 H-色烯。