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Volumn 55, Issue 15, 1990, Pages 4683-4687

Microbial Oxidation of Chloroaromatics in the Enantiodivergent Synthesis of Pyrrolizidine Alkaloids: Trihydroxyheliotridanes

Author keywords

[No Author keywords available]

Indexed keywords

PYRROLIZIDINE DERIVATIVE;

EID: 0024988763     PISSN: 00223263     EISSN: 15206904     Source Type: Journal    
DOI: 10.1021/jo00302a037     Document Type: Article
Times cited : (169)

References (45)
  • 10
    • 0023618648 scopus 로고
    • references therein. Swainsonine
    • Ganem, B. J. Org. Chem. 1987, 52, 5492 and references therein. Swainsonine:
    • (1987) J. Org. Chem. , vol.52 , pp. 5492
    • Ganem, B.1
  • 40
    • 85022679237 scopus 로고
    • For a review of carbohydrates in organic synthesis
    • The “Chiron” Approach; Pergamon Press: Oxford
    • For a review of carbohydrates in organic synthesis, see: Hanessian, S. Total Synthesis of Natural Products: The “Chiron” Approach; Pergamon Press: Oxford, 1983.
    • (1983) Total Synthesis of Natural Products
    • Hanessian, S.1
  • 41
    • 0023902099 scopus 로고
    • For the use of lactol 6 in organic synthesis
    • For the use of lactol 6 in organic synthesis, see: Williams, D. R.; Klinger, F. D. J. Org. Chem. 1988, 53, 2134.
    • (1988) J. Org. Chem. , vol.53 , pp. 2134
    • Williams, D.R.1    Klinger, F.D.2
  • 42
  • 45
    • 85022620490 scopus 로고    scopus 로고
    • All nonhydrolytic reactions were carried out in a nitrogen or argon atmosphere, with standard techniques for the exclusion of air and moisture
    • THF, ethyl ether, DME, and benzene were distilled from benzophenone ketyl, dichloromethane, and toluene from calcium hydride. Analytical TLC was performed on silica gel 60F-254 plates. Flash chromatography was performed using Kieselgel 60 (230–400 mesh). Mass spectra were recorded on a DuPont 20–491 or a Varian MAT-112 instrument (low resolution) or on a double-focusing DuPont 21-110C or VGT instrument (exact mass). Infrared spectra were recorded as neat samples (NaCl plates) on a Perkin-Elmer 1600 Series FT spectrometer. Proton NMR spectra were obtained on a Bruker WP-270 instrument. Proton chemical shifts are reported in parts per million (ppm) relative to chloroform (7.24 ppm). Carbon NMR spectra were recorded on a Bruker WP-270 instrument. Carbon chemical shifts are reported in parts per million relative to the center line of the CDC13 triplet (77.0 ppm). The multiplicity is indicated by CH3, CH2, CH, or C and were determined by INEPT
    • All nonhydrolytic reactions were carried out in a nitrogen or argon atmosphere, with standard techniques for the exclusion of air and moisture. Glassware used for moisture-sensitive reactions was flame-dried with an internal inert gas sweep. THF, ethyl ether, DME, and benzene were distilled from benzophenone ketyl, dichloromethane, and toluene from calcium hydride. Analytical TLC was performed on silica gel 60F-254 plates. Flash chromatography was performed using Kieselgel 60 (230–400 mesh). Mass spectra were recorded on a DuPont 20–491 or a Varian MAT-112 instrument (low resolution) or on a double-focusing DuPont 21-110C or VGT instrument (exact mass). Infrared spectra were recorded as neat samples (NaCl plates) on a Perkin-Elmer 1600 Series FT spectrometer. Proton NMR spectra were obtained on a Bruker WP-270 instrument. Proton chemical shifts are reported in parts per million (ppm) relative to chloroform (7.24 ppm). Carbon NMR spectra were recorded on a Bruker WP-270 instrument. Carbon chemical shifts are reported in parts per million relative to the center line of the CDC13 triplet (77.0 ppm). The multiplicity is indicated by CH3, CH2, CH, or C and were determined by INEPT experiments.
    • Glassware used for moisture-sensitive reactions was flame-dried with an internal inert gas sweep


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