The microbial biotransformation of Delta(9)-tetrahydrocannabinol was investigated using a collection of 206 alkane-degrading strains. Fifteen percent of these strains, mainly gram-positive strains from the genera Rhodococcus, Mycobacterium, Gordonia, and Dietzia, yielded more-polar derivatives. Eight derivatives were produced on a mg scale, isolated, and purified, and their chemical structures were elucidated with the use of liquid chromatography-mass spectrometry, H-1-nuclear magnetic resonance (H-1-NMR), and two-dimensional NMR (H-1-H-1 correlation spectroscopy and heteronuclear multiple bond coherence). All eight biotransformation products possessed modified alkyl chains, with hydroxy, carboxy, and ester functionalities. In a number of strains, beta-oxidation of the initially formed C-5 carboxylic acid led to the formation of a carboxylic acid lacking two methylene groups.
- MICROBIAL TRANSFORMATION
- MICROBIOLOGICAL TRANSFORMATIONS