The novel tetracyclic sesquiterpenoid (+)-cyclomyltaylan-5α-ol 1 has been synthesized starting from (S)-(+)-Hajos-Wiechert ketone analogue 3via SmI2-promoted reductive cyclization as a key step. Thus, the absolute configuration has been established to be 2R,3R, 4R,5S,6R,7R (cyclomyltaylane numbering) as depicted in structure 1.
(+)-cyclomyltaylan-5α-ol 1 has been synthesized starting from (S)-(+)-Hajos–Wiechert ketone analogue 10via stereoselective Claisen rearrangement followed by SmI2-promoted reductive cyclisation. Thus, the absolute configuration has been established to be 2R,3R,4R,5S,6R,7R (cyclomyltaylane numbering) as depicted in structure 1.
[EN] OPSIN-BINDING LIGANDS, COMPOSITIONS AND METHODS OF USE<br/>[FR] LIGANDS DE LIAISON À UNE OPSINE, COMPOSITIONS ET PROCÉDÉS D'UTILISATION
申请人:BIKAM PHARMACEUTICALS INC
公开号:WO2013058809A1
公开(公告)日:2013-04-25
Compounds are disclosed that are useful for treating ophthalmic conditions caused by or related to production of toxic visual cycle products that accumulate in the eye, such as dry adult macular degeneration, as well as conditions caused by or related to the misfolding of mutant opsin proteins and/or the mis-localization of opsin proteins. Compositions of these compounds alone or in combination with other therapeutic agents are also described, along with therapeutic methods of using such compounds and/or compositions. Methods of synthesizing such agents are also disclosed.
Synthesis of CDE and BCDE Molecular Fragments of the Limonoids Havanensin and Azadiradione
作者:A. Fernández-Mateos、L. Mateos Burón、E. M. Martín de la Nava、R. Rubio González
DOI:10.1021/jo0205311
日期:2003.5.1
A new approach to the synthesis of CDE and BCDE molecular fragments of the limonoids havanensin and azadiradione has been achieved from cyclocitral and drimenal in seven steps in overall yields of 20 and 9%, respectively.