Transformations of 3,3,4-tricyano-3,4-dihydro-2H-pyran-4-carboxamides. Synthesis of pyrano[3,4-c]pyrrole derivatives
作者:M. Yu. Ievlev、O. V. Ershov、A. N. Vasil’ev、V. A. Tafeenko、M. D. Surazhskaya、O. E. Nasakin
DOI:10.1134/s1070428017070119
日期:2017.7
A procedure has been developed for the synthesis of polyfunctional pyrano[3,4-c]pyrrole derivatives via intramolecular cyclization involving vicinal cyano and carboxamide groups on a pyran ring. 3-Amino-1-oxo-1,3a,4,7a-tetrahydropyrano[3,4-c]pyrrole-3a,7a-dicarbonitrile thus obtained react with organic amines to give stable ammonium salts and undergo hydrolysis to 1,3-dioxo-1,2,3,3a,4,7a-hexahydropyrano[3
已经开发了一种通过分子内环化反应合成多官能吡喃并[3,4- c ]吡咯衍生物的方法,所述分子内环化涉及在吡喃环上的邻位氰基和羧酰胺基团。如此获得的3-氨基-1-氧代-1,3a,4,7a-四氢吡喃[3,4- c ]吡咯-3a,7a-二腈与有机胺反应生成稳定的铵盐并水解为1,3-在硫酸存在下的二氧-1,2,3,3a,4,7a-六氢吡喃[3,4- c ]吡咯-3a,7a-二腈。