Microbial oxidation of benzyl sulfides and bibenzyl by Mortierella isabellina and Helminthosporium species
The biotransformation of 1,2-diphenylethane by the fungus Mortierella isabellina ATCC 42613, and that of a series of alkyl benzyl sulfides by the fungi M. isabellina and Helminthosporium species NRRL 4671 have been studied. Mortierella hydroxylates 1,2-diphenylethane in low yield, giving (S)-1,2-dip...
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Published in | Canadian journal of chemistry Vol. 69; no. 12; pp. 1989 - 1993 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
Ottawa, Canada
NRC Research Press
01.12.1991
National Research Council of Canada |
Subjects | |
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Abstract | The biotransformation of 1,2-diphenylethane by the fungus Mortierella isabellina ATCC 42613, and that of a series of alkyl benzyl sulfides by the fungi M. isabellina and Helminthosporium species NRRL 4671 have been studied. Mortierella hydroxylates 1,2-diphenylethane in low yield, giving (S)-1,2-diphenylethanol with an enantiomeric purity of 33%. Bioconversions of deuterium-labelled and racemic 1,2-diphenylethanol by M. isabellina demonstrate that this organism performs reversible oxidation/reduction of the alcohol. Biotransformations of n-alkyl benzyl sulfides by H. species give predominantly the (S) enantiomer of sulfoxide, with no sulfone formation, but M. isabellina, although showing a general preference for the oxidation of alkyl benzyl sulfides to (R) sulfoxides, also generates sulfones from n-alkyl benzyl sulfides in a time-dependent manner that suggests a stereoselective removal of (R) sulfoxide. The latter microorganism can be used, however, for the production of (R)-benzyl methyl and benzyl isopropyl sulfoxides, and gives (S)-benzyl tert-butyl sulfoxide in low yield. Key words: biotransformation, enzymes, sulfoxides. |
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AbstractList | The biotransformation of 1,2-diphenylethane by the fungus Mortierella isabellina ATCC 42613, and that of a series of alkyl benzyl sulfides by the fungi M. isabellina and Helminthosporium species NRRL 4671 have been studied. Mortierella hydroxylates 1,2-diphenylethane in low yield, giving (S)-1,2-diphenylethanol with an enantiomeric purity of 33%. Bioconversions of deuterium-labelled and racemic 1,2-diphenylethanol by M. isabellina demonstrate that this organism performs reversible oxidation/reduction of the alcohol. Biotransformations of n-alkyl benzyl sulfides by H. species give predominantly the (S) enantiomer of sulfoxide, with no sulfone formation, but M. isabellina, although showing a general preference for the oxidation of alkyl benzyl sulfides to (R) sulfoxides, also generates sulfones from n-alkyl benzyl sulfides in a time-dependent manner that suggests a stereoselective removal of (R) sulfoxide. The latter microorganism can be used, however, for the production of (R)-benzyl methyl and benzyl isopropyl sulfoxides, and gives (S)-benzyl tert-butyl sulfoxide in low yield. Key words: biotransformation, enzymes, sulfoxides. The biotransformation of 1,2-diphenylethane by the fungus Mortierella isabellina ATCC 42613, and that of a series of alkyl benzyl sulfides by the fungi M. isabellina and Helminthosporium species NRRL 4671 have been studied. Mortierella hydroxylates 1,2-diphenylethane in low yield, giving (S)-1,2-diphenylethanol with an enantiomeric purity of 33%. Bioconversions of deuterium-labelled and racemic 1,2-diphenylethanol by M. isabellina demonstrate that this organism performs reversible oxidation/reduction of the alcohol. Biotransformations of n-alkyl benzyl sulfides by Helminthosporium species give predominantly the (S) enantiomer of sulfoxide, with no sulfone formation, but M. isabellina , although showing a general preference for the oxidation of alkyl benzyl sulfides to (R) sulfoxides, also generates sulfones from n-alkyl benzyl sulfides in a time-dependent manner that suggests a stereoselective removal of (R) sulfoxide. |
Abstract_FL | On a étudié la biotransformation du 1,2-diphényléthane par le champignon Mortierella isabellina ATCC 42613 et celle d'une série de sulfures d'alkyle et de benzyle par les champignons M. isabellina et Helminthosporium NRRL 4671. Le M. isabellina provoque une hydroxylation du 1,2-diphényléthane avec un faible rendement conduisant au (S)-1,2-diphényléthanol, avec une pureté énantiomérique de 33%. Les bioconversions, par le M. isabellina, des 1,2-diphényléthanols racémiques et marqués au deutérium démontrent que cet organisme provoque une oxydoréduction réversible de l'alcool. Les biotransformations, par les espèces H., des sulfures de n-alkyles et de benzyle conduisent principalement aux énantiomères (S) des sulfoxydes, sans formation de sulfone. Par ailleurs, même si le M. isabellina montre une préférence générale pour l'oxydation des sulfures d'alkyles et de benzyle en (R)-sulfoxydes, il conduit aussi à la formation de sulfones; la quantité de sulfone qui se forme en fonction du temps suggère qu'il y a un enlèvement stéréosélectif du sulfoxyde (R). On peut toutefois utiliser ce dernier micro-organisme pour produire, avec de faibles rendements, les sulfoxydes (R) de benzyle et de méthyle (ou de benzyle et d'isopropyle) et le sulfoxyde (S) de benzyle et de tert-butyle. Mots clés : biotransformation, enzymes, sulfoxides. |
Author | Viski, Peter Rand, Cynthia G Holland, Herbert L Brown, Frances M |
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Title | Microbial oxidation of benzyl sulfides and bibenzyl by Mortierella isabellina and Helminthosporium species |
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