The reaction of anilines, benzaldehydes. and ethyl 3,3-diethoxypropionate in the presence of Yb(OTf)(3) proceeded under mild reaction conditions to give dihydropyridines (DHPs). We have found that the reaction depended on the solvent and the DHPs were obtained selectively in 1,4-dioxane as a solvent. Various 2,6-unsubstituted DHPs were synthesized in one pot in satisfactory yields. (C) 2011 Elsevier Ltd. All rights reserved.
Montmorillonite K-10 catalyzed green synthesis of 2,6-unsubstituted dihydropyridines as potential inhibitors of PDE4
作者:T. Ram Reddy、G. Rajeshwar Reddy、L. Srinivasula Reddy、Chandana Lakshmi T. Meda、Kishore V.L. Parsa、K. Shiva Kumar、Y. Lingappa、Manojit Pal
DOI:10.1016/j.ejmech.2012.12.052
日期:2013.4
Montmorillonite K-10 mediated MCR of anilines, arylaldehydes and ethyl-3,3-diethoxypropionate in water afforded 2,6-unsubstituted dihydropyridines depending on the nature of anilines employed. A variety of dihydropyridines were prepared by using this green methodology in good yields and montmorillonite K-10 was found to be an inexpensive and reusable catalyst. The structure elaboration of a representative compound was carried out under Heck conditions. Some of the compounds synthesized showed significant inhibition of PDE4B when tested in vitro. Docking studies indicated that one of the ester moieties of these compounds played a key role in their interactions with the PDE4B protein. (C) 2013 Elsevier Masson SAS. All rights reserved.
SAUSIN A. EH.; CHEKAVICHUS B. S.; LUSIS V. K.; DUBUR G. YA., XIMIYA GETEROTSIKL. SOEDIN., 1980, HO 4, 493-501
作者:SAUSIN A. EH.、 CHEKAVICHUS B. S.、 LUSIS V. K.、 DUBUR G. YA.
The reaction of anilines, benzaldehydes. and ethyl 3,3-diethoxypropionate in the presence of Yb(OTf)(3) proceeded under mild reaction conditions to give dihydropyridines (DHPs). We have found that the reaction depended on the solvent and the DHPs were obtained selectively in 1,4-dioxane as a solvent. Various 2,6-unsubstituted DHPs were synthesized in one pot in satisfactory yields. (C) 2011 Elsevier Ltd. All rights reserved.