作者:A. M. Shestopalov、Yu. M. Emelianova、V. N. Nesterov
DOI:10.1023/a:1022135402451
日期:——
Substituted 2-aminochromenes were synthesized by three-component condensation of aromatic aldehydes, derivatives of cyanoacetic acid, and phenols or naphthols. The molecular and crystal structure of 2-amino-3-cyano-6-hydroxy-4-phenyl-4H-benzo[f]chromene was established by X-ray diffraction analysis.
A multi-component electro-organic synthesis of 2-amino-4H-chromenes
作者:S. Makarem、A.A. Mohammadi、A.R. Fakhari
DOI:10.1016/j.tetlet.2008.10.006
日期:2008.12
Electrochemically induced multi-component condensation of resorcinol, malononitrile, and various aldehydes in propanol in an undivided cell in the presence of NaBr as an electrolyte results in the formation of 2-amino-4H-chromenes in good yields and short reaction time. (C) 2008 Published by Elsevier Ltd.
A facile and efficient synthesis of 2-amino-3-cyano-4H-chromenes and tetrahydrobenzo[b]pyrans using 2,2,2-trifluoroethanol as a metal-free and reusable medium
A highly efficient one-potthree-component regioselective synthesis of 2-amino-3-cyano-4H-chromene and tetrahydrobenzo[b]pyran derivatives has been developed by annulation of aldehydes, malononitrile, and resorcinol or dimedone under reflux conditions in 2,2,2-trifluoroethanol without the use of a catalyst or any other additive.
通过在回流条件下2醛,丙二腈和间苯二酚或二甲酮的环化反应,已经开发出了一种高效的一锅三组分区域选择性合成2-氨基-3-氰基-4 H-色烯和四氢苯并[ b ]吡喃衍生物的方法。 ,2,2-三氟乙醇,不使用催化剂或任何其他添加剂。