85541-82-8Relevant articles and documents
The first synthesis of Krempene B
Shen, Li-Qun,Huang, Su-Yu,Tang, Yong,Lei, Fu-Hou
, p. 1398 - 1402 (2012)
The synthesis of Krempene B, which can be isolated from the marine soft coral Cladiella krempfi, is achieved in 23.9% overall yield from commercially available 3β-acetoxy-5-pregnen-20-one by 11 steps. Key transformations include the dienone-phenol rearrangement of steroids and Wittig reaction.
AZASTEROIDS FOR TREATMENT OF TUBERCULOSIS
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, (2017/12/15)
The present invention provides a compound having the structure: formula (I), for use in combinatoin with an anti-tuberculosis drug for treating a subject infected with M. tuberculosis.
An efficient approach to novel 17-5′-(1′,2′,4′)- oxadiazolyl androstenes via the cyclodehydration of cytotoxic O-steroidacylamidoximes, and an evaluation of their inhibitory action on 17α-hydroxylase/C17,20-lyase
Kovács, Dóra,W?lfling, János,Szabó, Nikoletta,Szécsi, Mihály,Kovács, Ida,Zupkó, István,Frank, éva
, p. 649 - 660 (2013/12/04)
Novel 17-exo-oxadiazoles in the androst-5-ene series were efficiently synthesized in a two-step sequence via the corresponding O-acylamidoxime intermediates (obtained from steroidal 17-carboxylic acids and amidoximes in the presence of coupling reagent), which then underwent tetrabutylammonium fluoride-induced cyclocondensation under mild reaction conditions. The synthesized compounds were subjected to in vitro pharmacological studies to investigate their inhibitory effect on rat testicular C17,20-lyase and their antiproliferative action on four malignant human adherent cell lines (HeLa, MCF7, A2780 and A431). One of the oxadiazolyl derivatives proved to exert significant enzyme-inhibitory action (IC50 = 0.60 μM), while some of the isolated O-acylated amidoxime intermediates displayed high cytotoxic activities on all examined cell lines, with IC50 values in the range 0.22-3.94 μM.