Selective Access to Trisubstituted Macrocyclic E- and Z-Alkenes from the Ring-Closing Metathesis of Vinylsiloxanes
摘要:
Macrocyclic (E)-alkenylsiloxanes, obtained from E-selective ring-closing metathesis reactions, can be converted to the corresponding (Z)-alkenyl bromides and (E)-alkenyl iodides allowing access to both E- and Z-trisubstituted macrocyclic alkenes. The reaction conditions and substrate scope of these stereoselective transformations are explored.
作者:Robert J. Bass、Bernard J. Banks、Michael R. G. Leeming、Michael Snarey
DOI:10.1039/p19810000124
日期:——
The synthesis of macrocyclic lactones related to zearalanone is described. The reaction of salicylic acids with 1,9-dibromononane, 1,9-dichloro-5-oxanonane, and 1,9-dibromononan-5-one was used to prepare the corresponding lactones. Cyclisation of 2-(9-hydroxynonyloxy)benzoic acid, 4,6-dibenzyloxy-2-(9-hydroxynonyloxy)benzoic acid, and 4-benzyloxy-2-hydroxy-6-(9-hydroxy-5-oxodecyloxy)benzoic acid using