Abstract Several orthogonally protected spermidine and norspermidine derivatives have been synthesized via cyanoethylation of monoprotected 1,4‐butanediamine (putrescine) or 1,3‐propanediamine followed by protection of their secondary amino groups and final reduction of the nitriles with lithium aluminum hydride in etheral solution at 0°C, thus affording protected norspermidine or spermidine that may
Achieving selectivity for copper over zinc with luminescent terbium probes bearing phenanthridine antennas
作者:S. M. Harris、K. Srivastava、A. B. League、K. E. Ziebarth、V. C. Pierre
DOI:10.1039/c7dt04203e
日期:——
A family of terbium probes was synthesized and evaluated for the luminescencedetection of copper and zinc in water at neutral pH. Each probe incorporates a terbiumion chelated by a macrocyclic polyaminocarboxylate and conjugated to either one, two, or three phenanthridine antennas via a diamine linker. All three probes, Tb-1Phen, Tb-2Phen, and Tb-3Phen, exhibit similar responses toward copper and
(POLY) AMINOACETAMIDE DERIVATIVES OF EPIPODOPHYLLOTOXIN THEIR PROCESS OF PREPARATION AND THEIR APPLICATIONS IN THERAPEUTICS AS ANTICANCER AGENTS
申请人:IMBERT Thierry
公开号:US20110053967A1
公开(公告)日:2011-03-03
The present invention relates to novel podophyllotoxin derivatives substituted in the 4-position by a substituted (poly)aminoalkylaminoacetamide chain, to their process of preparation and to their use as medicament as anticancer agents.
Total syntheses of polyamine amides PhTX-4.3.3 and PhTX-3.4.3: Reductive alkylation is a rapid, practical route to philanthotoxins
作者:Eduardo Moya、Ian S. Blagbrough
DOI:10.1016/0040-4039(95)01996-u
日期:1995.12
Reductive alkylation allows a rapid and practical entry to the polyamine amide wasp toxin philanthotoxin-4.3.3. Philanthotoxin-3.4.3 has been prepared, in two steps, by the monoacylation of spermine. These polyamine amides are selective molecular pharmacological tools for cation channels gated by glutamic acid and acetylcholine, and may have potential as neuroprotective agents.
Practical synthesis of the putative polyamine spider toxin FTX: a proposed blocker of voltage-sensitive calcium channels
作者:Ian S. Blagbrough、Eduardo Moya
DOI:10.1016/s0040-4039(00)73048-6
日期:1994.3
FTX (FTX-3.3), a putative polyamine toxin from American funnel-web spiders, has been synthesized from tri-CBZ-L-arginine. Raney nickel mediated desulfurization of a thioamide, generated selectively with Lawesson's reagent in the presence of the benzyloxycarbamates, allowed ready access to the S-enantiomer. The synthetic sample with the claimed structure for FTX-3.3 differs spectroscopically from the data published for the isolated toxin. The published structure requires a reappraisal of the spectroscopic data.