Improved Synthesis of Racemate and Enantiomers of Taniguchi Lactone and Conversion of Their C-C Double Bonds into Triple Bonds
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作者:
Krizkova, Petra Malova
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Univ Vienna, Inst Organ Chem, Fac Chem, Wahringerstr 38, A-1090 Vienna, AustriaUniv Vienna, Inst Organ Chem, Fac Chem, Wahringerstr 38, A-1090 Vienna, Austria
Krizkova, Petra Malova
[1
]
Lindner, Wolfgang
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Univ Vienna, Inst Analyt Chem, Fac Chem, Wahringerstr 38, A-1090 Vienna, AustriaUniv Vienna, Inst Organ Chem, Fac Chem, Wahringerstr 38, A-1090 Vienna, Austria
Lindner, Wolfgang
[2
]
Hammerschmidt, Friedrich
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Univ Vienna, Inst Organ Chem, Fac Chem, Wahringerstr 38, A-1090 Vienna, AustriaUniv Vienna, Inst Organ Chem, Fac Chem, Wahringerstr 38, A-1090 Vienna, Austria
Hammerschmidt, Friedrich
[1
]
机构:
[1] Univ Vienna, Inst Organ Chem, Fac Chem, Wahringerstr 38, A-1090 Vienna, Austria
[2] Univ Vienna, Inst Analyt Chem, Fac Chem, Wahringerstr 38, A-1090 Vienna, Austria
cis-2-Butene-1,4-diol was heated with triethyl orthoacetate and p-hydroquinone as catalyst at 170 degrees C to give racemic Taniguchi lactone. It was converted into diastereomeric amides with (S)-1-phenylethylamine for stereoisomer resolution. The double bonds of (+/-)-, (R)- and (S)-Taniguchi lactones were brominated and dehydrobrominated in two steps, using at first DBU and then LDA, to deliver the triple bonds.