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Total synthesis of Kempene-2:
Reference: Dauben, W. G.; Farkas, I.; Bridon, D. P.; Chuang, C. P.; Henegar, K. E. J. Am. Chem. Soc. 1991, 113, 5883. DOI
Keywords: Enone → Ketone • Ketone → Alkyl-OH • O-H → O-Bn • Li-Silane+Ketone • Li-Ether+Ketone • EnolEther → Aldehyde • Hydroboration alkene • CompRed-Alkene/Alkene+B-H • Hydroboration alkene • Alkyl-OH → Ketone • Ketone → Ketone-α-Halo • Ketone → Enone • Dehydrohalogenation → Enone • Alkene → Diol-1,2 • O-Bn → O-H • O-H → O-C(O)R • EnolEther → Ketone • Alkyl-OH → Aldehyde • Diels-Alder, quinone • CompRed-Ketone/Ketone+B-H • Peterson → Enol ether • Reductive formylation • Wittig-methyl • Aldol-H+ → Enone • McMurry coupling → Ene • Diol-1,2 cleavage • Diels-Alder, Enone • O-H → O-Bn •
Reagents: BF3·OEt2 • Zn° • BH(sBu3)-Li+ • H2O2, NaOH • NaH • Benzyl-X • Iodide, R4N+ • BuLi(sec) • Formic acid • PPh3=CH2 • KOtBu • BH(Siam)2 • H2O2, NaOH • NaH • BH3 • DMSO, (COCl)2 (Swern) • Tribromide, pyridinium • Carbonate, lithium • OsO4 • NMe3(O) • H2, Pd • Periodate, sodium • TsOH • DMAP • HCl, EtOH • Al2O3 • TiCl3, Zn/Cu • Butadiene • AlEtCl2 • Butadiene • Benzyl-X •

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