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Chromium and tungsten pentacarbonyl groups as reactivity auxiliaries in the Diels-Alder reactions of alkenyl carbene complexes with 1,3-dienes
Reactions de complexe du type R 1 CH=CHC(OMe)=M(CO) 3 (R 1 =H,CH 3 (trans), M=Cr, Mo, W) avec l'isoprene et des complexes du type R 1 R 2 C=CR 3 (OMe)=M(CO) 5 (R 1 ,R 2 ,R 3 =H; R 1 =CH 3 , R 2 R 3Expand
  • 113
Abstract 10-Deacetyltaxol is prepared from paclitaxel in 95% yield by using H 2 O 2 in the presence of NaHCO 3 .
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[2 + 1] Versus [4 + 2] cycloadditions of Fischer carbene complexes with 1,3-dienes. Evidence for a zwitterionic intermediate in a cyclopropanation reaction
Reactions des complexes pentacarbonyles d'α-methoxy benzylidene tungstene et chrome avec le methyl trimethylsiloxy-3 butadiene-1,3yl ether pour donner des cyclopropanes et le methyl phenyl-1 vinylExpand
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Cyclopentenone formation via hydrogen activation in the reactions of chromium carbene complexes with alkynes
The reactions of alkyl chromium carbene complexes with alkynes have been found to give cyclopentenones. Mechanisms are proposed to account for the formation of these products that involve metalExpand
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Cyclopropanations and cycloadditions of transition metal carbene complexes
The first examples of the cyclopropanation of 1,3-dienes with transition metal carbene complexes is reported for the heteroatom-stablized pentacarbonyl complexes of the group 6 metals. The reactionExpand
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