Towards a biomimetic poly-aminoketone foldamer: synthesis of a triply protected monomer and its coupling to a dimer, trimer and tetramer
作者:Romain Barbe、Jens Hasserodt
DOI:10.1016/j.tet.2006.12.081
日期:2007.3
The design of a new biomimetic foldamer, relying on the weak amine–carbonyl interaction for secondary structure formation, is presented. The efficient synthesis of a triply protected monomer starting from glycidol was developed. This monomer contains a dioxolane-protected keto group that will allow liberation of the ketone functionality in the backbone once construction of the oligomeric backbone is
Dihydroxyacetone phosphate (DHAP, 7) and bromoacetol phosphate (BAP, 6) were synthesized in four and five steps, respectively, starting from 1,3-dibromoacetone (2). The key step involves desymetrization and ketone protection of 2 to prepare alcohol 3. Phosphorylation of 3 followed by hydrogenolysis and then deprotection of the ketal function afforded 6. A solution of 7 was prepared after treatment of 6 with NaOH. This original route allows a short and convenient preparation of DHAP in large scale and high purity for application to the synthesis of sugar derivatives and preparation of BAP for triosephosphate isomerase inhibition.
CHARI, R. V. J.;KOZARICH, J. W., J. ORG. CHEM., 1982, 47, N 12, 2355-2358