In order to obtain N-benzyl-3,5-dicarbethoxy-2,6-dimethyl-4-phenyl-1,4-dihydropyridine 1 as a lead compound of pharmacological interest, the classical Hantzsch synthetic method and the modified Collie procedure were used. However, only a very low yield of 1 was obtained in a mixture with larger amounts of some by-products (2, 3, 4). Compound 1 was then synthesized in satisfactory yield via a different
Novel Syntheses of Heterocycles with N-(1-Haloalkyl)azinium Halides. Part V. Preparation of N-Substituted 1,4-Dihydropyridines
作者:Jean-Jacques Vanden Eynde、Annie Mayence、André Maquestiau、Ernst Anders
DOI:10.1080/00397919208021145
日期:1992.12
Abstract Thirty N-substituted Hantzsch 1,4-dihydropyridines were prepared under mild and neutral conditions from N-substituted enaminocarbonyl derivatives and aldehydes activated under the form of N-(1-chloroalkyl)pyridinium chlorides by means of thionyl chloride and pyridine. The scope of the method is discussed.
1-aryl- and 1-benzyl-3,5-diethoxycarbonyl-1,4-dihydropyridines
作者:A. �. Sausin'、B. S. Chekavichus、V. K. Lusis、G. Ya. Dubur
DOI:10.1007/bf00552778
日期:1980.4
Cross-dehydrogenative regioselective Csp<sup>3</sup>–Csp<sup>2</sup>coupling of enamino-ketones followed by rearrangement: an amazing formation route to acridine-1,8-dione derivatives
作者:Rajib Sarkar、Chhanda Mukhopadhyay
DOI:10.1039/c5ob02655e
日期:——
A new general method for the synthesis of acridine-1,8-diones through CDC coupling of enamino-ketones followed by rearrangement has been developed. This is a Cu(I) catalyzed procedure, based on the crossdehydrogenativecoupling of the Csp3–H bond with the Csp2–H bond of enamino-ketones followed by rearrangement to acridine-1,8-diones in the presence of PTSA under an aerobic atmosphere. The synthetic