Access to steroidal pyridazines via modified thiohydrazidesстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
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Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 9 июня 2016 г.
Аннотация:An approach to steroids annulated with pyridazines via cascade imination/electrocyclization of chlorovinyl aldehydes with oxamic acid thiohydrazides is disclosed. A mechanistic rationalization was performed using real-time 1H NMR spectroscopy and computational studies. A series of 18-nor-5[small alpha]-androsta-2,13-diene[3,2-d]pyridazines, androsta-2-ene[3,2-d]pyridazines and [capital Delta]1,3,5(10)-estratrieno[16,17-d]pyridazines were synthesized from native hormones. These compounds were screened for cytotoxicity against the human estrogen-responsive breast cancer cell line MCF-7 and the estrogen-independent breast cancer cell line MDA-MB-231. The structure-activity relationship analysis revealed that the annulation of the pyridazine moiety to the A-ring of the 17[small beta]-hydroxy-5[small alpha]-androsta-2-ene core provides high antiproliferative activity. Compounds 7a and 10b exhibited higher antiproliferative potency than the drug cisplatin. 5[small alpha]-Androsta-2-ene[3,2-d]pyridazine 10c showed good selectivity against the MCF-7 breast cancer cells.