A unified approach to benzo[<i>c</i>]phenanthridines <i>via</i> the cascade dual-annulation/formylation of 2-alkynyl/alkenylbenzonitriles
作者:Shalini Verma、Manoj Kumar、Akhilesh K. Verma
DOI:10.1039/d3cc00197k
日期:——
A base-mediated versatile cascade dual-annulation and formylation of 2-alkenyl/alkynylbenzonitriles with 2-methylbenzonitriles has been established for the construction of four different classes of amino and amido substituted benzo[c]phenanthridines and benzo[c]phenanthrolines. The synthesized molecules could be of utmost relevance in pharmaceuticals. The transformation uses the solvent DMF as the
The synthesis of 11-substituted 6-amino-11,12-dihydrobenzo[c]phenanthridines and 11-substituted 6-aminobenzo[c]phenanthridines through an efficient method is described. The antiproliferative activity of selected compounds against a wide panel of tumor cell lines was tested in the in vitro anticancer screening and the in vivo hollow fiber assay of the National Cancer Institute. Several compounds turned out to exhibit considerable cytotoxicity for tumor cells. For the study of structure-activity relationships different substituents were introduced in the 11-position. Compounds with methoxyphenyl substituents tended to show the highest potency. Several compounds exhibited noteworthy antitumor activity with GI(50) values across all cell lines < 1 mu M. 6-Amino-11-(3,4,5-trimethoxyphenyl)benzo [c] phenanthridine perchlorate was the most potent agent in the NCI's in vivo hollow fiber assay. Most of the tested compounds showed a remarkable selectivity for leukemia, breast cancer, and prostate cancer.
A Two-Step Synthesis of Cytostatically Active Benzo[c]phenanthridine Derivatives
Transition-metal-free regioselective hydroamination of styrenes with amino-heteroarenes
作者:Priyanka Meena、Ayushee、Monika Patel、Akhilesh K. Verma
DOI:10.1039/d2cc02781j
日期:——
The base-mediated anti-Markovnikov hydroamination of functionally varied styrenes with amino-substituted pyridine, quinoline, pyrimidine, pyrazine, and phenanthridine with excellent regioselectivity has been described. Double hydroamination was observed chemoselectively on the secondary amine, leaving the primary amine intact. Experimental evidence suggests that the proposed reaction involves the nucleophilic