Regio- and Stereoselective Ring Openings of 3-Aza-2-oxabicyclo[2.2.1]hept-5-ene Systems with Copper Catalyst-Modified Grignard Reagents: Application to the Synthesis of an Inhibitor of 5-Lipoxygenase
作者:Matthew D. Surman、Mark J. Mulvihill、Marvin J. Miller
DOI:10.1021/jo016275u
日期:2002.6.1
hetero Diels-Alder cycloadducts 2 with organomagnesium reagents in the presence of a catalytic amount of copper induces ring opening to afford predominantly monocyclic anti-1,2-hydroxamic acids 12. Alkylmagnesium reagents were found to give superior regio- and stereoselectivities compared with vinyl and arylmagnesium reagents. This cycloadduct ring opening methodology was applied to the synthesis of a
Novel α-substituted β-amino diesters from acylnitroso-derived hetero-Diels–Alder cycloadducts
作者:Matthew D Surman、Mark J Mulvihill、Marvin J Miller
DOI:10.1016/s0040-4039(01)02353-x
日期:2002.2
starting from acylnitroso-derived Diels–Alder adducts of cyclopentadiene. Treatment of the cycloadducts with copper catalyst-modified methylmagnesiumbromide gave anti-1,2-cyclopentenyl hydroxamic acids. Reduction of the hydroxamate NO bond with titanium(III) chloride followed by ozonolytic cleavage of the cyclopentenyl olefin provided the desired α-methyl β-amino diesters.