Comparing the Stereoselective Biooxidation of Cyclobutanones by Recombinant Strains Expressing Bacterial Baeyer–Villiger Monooxygenases
作者:Florian Rudroff、Joanna Rydz、Freek H. Ogink、Michael Fink、Marko D. Mihovilovic
DOI:10.1002/adsc.200700072
日期:2007.6.4
cyclobutanone structural motif was investigated using a collection of eight monooxygenases of different bacterial origin. This platform of enzymes is able to perform stereoselective biotransformations on an array of structurally diverse substrates. With several ketone precursors, biooxidations yielded enantiocomplementary butyrolactones as key intermediates for the synthesis of natural products and bioactive compounds
The invention relates to a method of preventing or treating cartilage damage by administering a GABA analog such as, for example, a compound of Formula
1
and pharmaceutically acceptable salts thereof, wherein R
1
is hydrogen or straight or branched lower alkyl, and n is an integer of from 4 to 6.
The present invention relates to a method for preparing pregabalin ((S)-3-(aminomethyl)-5-methylhexanoic acid which is useful for the prevention and treatment of seizure disorders, pins, and psychiatric disorders. According to the present invention, pregabalin can be prepared in a high enantiomeric excess of 99% or more, without an additional step of separating or purifying its enantiomer.
A practical route from oxetane or thietane to γ‐(thio)butyrolactone via solvated‐proton‐assisted cobalt‐catalyzed carbonylative ring expansion under syngas atmosphere has been established. A wide variety of γ‐(thio)butyrolactones can be afforded in good to excellent yields. The versatility of this method has been well demonstrated in the synthesis of intermediates towards the natural product Arctigenin
The invention relates to a method of treating tinnitus by administering an alpha2delta ligand such as, for example, a compound of Formula
1
and pharmaceutically acceptable salts thereof, wherein R
1
is hydrogen or straight or branched lower alkyl, and n is an integer of from 4 to 6.