249515-06-8Relevant academic research and scientific papers
Fluorescent analogs of the marine natural product psammaplin A: Synthesis and biological activity
Hentschel, Fabia,Sasse, Florenz,Lindel, Thomas
experimental part, p. 7120 - 7133 (2012/09/22)
The symmetrical disulfide psammaplin A from the marine sponge Pseudoceratina sp. was synthesized and structurally altered by replacement of one of the α-(hydroxyimino)acyl units by a fluorescent 4-coumarinacetyl moiety. Thus, the first fluorescent analogs of psammaplin A were obtained. Structural variation also covered the substitution pattern of the phenyl ring. Cytotoxicity of psammaplin A against the mouse fibroblast cell line L-929 (IC50 0.42 μg mL-1) was about two-fold higher than that of the fluorescent hybrid compounds, whereas the disulfide containing two 4-coumarinacetyl moieties was inactive. Fluorescence microscopy revealed uptake of the 4-coumarinacetyl-α-(hydroxyimino)acyl hybrids into the cytoplasm leading to fluorescence in close proximity of the nuclear envelope, most likely in the Golgi apparatus. We did not observe strong fluorescence inside the nucleus, where most of the target histone deacetylases are located. We conclude that reduction of the disulfide probably takes place outside the nucleus. The psammaplin-derived thiol exhibited potent activity against histone deacetylase in the low nanomolar range, but diminished cytotoxicity. Antimicrobial activity of the new derivatives was also determined.
Metabolic analysis of the cinnamate/monolignol pathway in Carthamus tinctorius seeds by a stable-isotope-dilution method
Sakakibara, Norikazu,Nakatsubo, Tomoyuki,Suzuki, Shiro,Shibata, Daisuke,Shimada, Mikio,Umezawa, Toshiaki
, p. 802 - 815 (2008/03/27)
The present study established a system for comprehensive metabolic analysis of the cinnamate/monolignol and lignan pathways by the use of a stable-isotope-dilution method. The system was successfully applied to characterization of the pathways in Carthamu
Synthesis and structure of the marine ascidian 8-oxoadenine aplidiamine
Itaya, Taisuke,Hozumi, Yoshitaka,Kanai, Tae,Ohta, Tomihisa
, p. 1297 - 1300 (2007/10/03)
Alkylation of 8-oxoadenosine (13) with 4-benzyloxy-3,5-dibromobenzyl bromide (20), followed by Dimroth rearrangement and acid hydrolysis, provided N-(3,5-dibromo-4-hydroxybenzyl)-8-oxoadenosine (15). The 2'- deoxy version of this reaction sequence accomplished the first synthesis of N-(3,5-dibromo-4- hydroxybenzyl)-8-oxoadenine (16), which is the correct expression for marine ascidian purine aplidiamine.
