Natural (5Z,9Z)-dienoic acids and key precursors of biologically active trienoic acids were prepared in high yields and with high stereoselectivity using cross-cyclomagnesiation of terminal and oxygenated 1,2-dienes with EtMgBr in… Click to show full abstract
Natural (5Z,9Z)-dienoic acids and key precursors of biologically active trienoic acids were prepared in high yields and with high stereoselectivity using cross-cyclomagnesiation of terminal and oxygenated 1,2-dienes with EtMgBr in the presence of Mg metal and Cp2TiCl2 catalyst at the key step.
               
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