A New Synthesis of an Important Prostaglandin Intermediate by Selective Oxidation of a Trimethylsilylated Primary Alcohol to the Corresponding Aldehyde
Investigation of the diastereofacial selectivity of the addition of 1-metalated (E)- and (Z)-hept-1-enes to the COREY aldehyde — A comparison between vinyllithium and vinyltitanium compounds1,2
In connection with the synthesis of prostaglandin intermediates a comparison of the addition of (Z)- and (E)-hept-1-enyllithium and (Z)- and (E)-hept-1-enyltitanium triisopropoxide to the COREYaldehyde revealed that the lithium compounds are preferentially added by a si-attack, the titanium compounds, however, by a preferred re-attack. The diastereoselectivity of the lithium compounds was generally