A solid-phase route for synthesis of 15N-labeled acylpolyamines is described. Utilizing alkylation at benzylic N-atom as a key step, 15N-atoms are incorporated by stepwise construction of the polyamine framework on the solid support. The derivatives were used as reference compounds for the investigation of the MS/MS behavior of spidertoxins.
A recently developed new and divergent approach for the solid-phase synthesis of polyamines and polyamine derivatives was extended to the preparation of linear pentamines, and it was applied to the synthesis of three quartets of isomeric polyamine spider toxins. The twelve synthetic acylpolyamines were investigated by HPLC-UV(DAD)-MS and HPLC-UV(DAD)-MS/MS and compared with the natural products in the complex mixture of the venom of Agelenopsis aperta. The comparative investigation supported the structures and assignments of seven previously found toxins and allowed the identification of an additional five polyamine derivatives in the natural sample. The MS/MS study of the isomerically pure polyamine derivatives revealed furthermore a characteristic pattern for the fragmentation of these compounds, which can possibly be used as evidence in the trace analysis of other polyamine derivatives.
Heterocyclic cycloalkanol ethylamines as norepinephrine reuptake inhibitors
作者:Joseph P. Sabatucci、Paige E. Mahaney、Jennifer Leiter、Grace Johnston、Kevin Burroughs、Scott Cosmi、Yingru Zhang、Douglas Ho、Darlene C. Deecher、Eugene Trybulski
DOI:10.1016/j.bmcl.2010.03.059
日期:2010.5
A series of heterocyclic cycloalkanol ethylamines have been prepared to expand our norepinephrine reuptake inhibitor (NRI) program. Synthesis of a variety of heterocycles identified (+)-S-21, a potent NRI efficacious in an animal model for thermoregulatory dysfunction. (C) 2010 Elsevier Ltd. All rights reserved.