[EN] PEDERIN AND PSYMBERIN AGENTS<br/>[FR] AGENTS DE PÉDÉRINE ET PSYMBÉRINE
申请人:UNIV PITTSBURGH
公开号:WO2013016120A1
公开(公告)日:2013-01-31
Compounds that include a pederin, psymberin or pederin/psymberin chimera scaffold. The pederin scaffold includes a substituent at the C10 and/or C13 position that may include a linker that may be conjugated to a targeting moiety. The psymberin scaffold includes a substituent at the C8 and/or C11 positions that may include a linker that may be conjugated to a targeting moiety. The pederin/psymberin chimera scaffold includes a substituent at the C10 and/or C13 position that may include a linker that may be conjugated to a targeting moiety. The pederin, psymberin or pederin/psymberin chimera scaffold may be modified to include substituents at positions other than the C10 or C 13 of pederin, or the C8 and C11 of psymberin.
The first synthesis of the proposed structures of chaetoviridins A 1–4 has been achieved in 10 steps by controlling the syn- or anti-aldol side chain. The angular lactone has been regioselectively introduced by condensation of a chiral dioxin-4-one to cazisochromene. Comparison of the NMR and circular dichroism data of the synthesized and reported natural products led to the complete reassignment and
An entirely new method for the dynamic kinetic resolution of a racemic, 2-methyl substituted, unsymmetrical 1,3-diketone via enzymatic reduction to give an enantiomerically pure compound is introduced.
carbonyl reduction can create a vast array of regio- and stereoisomers. If used as reference compounds, regio- and stereopure hydroxy ketides could facilitate the characterization of reductases with unclear regio- and stereoselectivity. We have combined nonenzymatic and enzymatic reduction and oxidation steps to obtain all four regio- and stereoisomers of tert-butyl hydroxyoxohexanoates in high optical purity
作者:Michael E. Green、Jason C. Rech、Paul E. Floreancig
DOI:10.1002/anie.200802548
日期:2008.9.8
The total synthesis of the potent cytotoxin theopederin D has been achieved through the use of an oxidative carbon–carbon bond cleavage reaction to form an acyliminium ion in the presence of acid labile acetal groups Other key transformations include an acid mediated functionalization of a tetrahydrofuranyl alcohol in the presence of a tetrahydropyranyl alcohol, a syn-selective glycal epoxide opening, and a catalytic asymmetric aldehyde-acid chloride condensation.