## Abstract ^13^C‐ and ^14^C‐uniformly labelled catechol was synthesized from phenol in three steps. Phenol was derivatized with 2‐chloro‐5‐nitrobenzophenone in THF containing NaH, followed by __ortho__‐hydroxylation with 35% aqueous H~2~O~2~ in sulphuric acid/glacial acetic acid solution, and by c
Synthesis of two 14C-labelled catechol-O-methyltransferase inhibitors
✍ Scribed by Carita Karlsson; Erkki Honkanen
- Publisher
- John Wiley and Sons
- Year
- 1991
- Tongue
- French
- Weight
- 162 KB
- Volume
- 29
- Category
- Article
- ISSN
- 0022-2135
No coin nor oath required. For personal study only.
✦ Synopsis
14C-labelled 3-(3,4dihydroxy-5-nitrophenylmethylidene)-2,4-pentanedione (4 and 14C-labelled E-N,NdiethyI-Zcyano-3-(3,4-dih droxy 5-nitropheny1)acryl-Key words: carbon-14 labelling, synthesis, COMT-inhibitor. amide (5) have been synthesized from (carbonyl-A Clvanillin.
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## Applications of Nuclear Magnetic Resonance Spcctroscopy in Organic Chemistry." 2nd cd., Pergamon. Oxford. 1969. p. 204. and references therein. ( I ) I.. Jung and P. Cordicr. Hull. Soc. Phartn. Srrushourg. 8. 89 (1965); through Chrw7. Ahstr.. 66, 31992 (1967). (22) K . Pawclc/yk. K. Adamski,
## Abstract The monoamine oxidase inhibitors pargyline and clorgyline have been synthesized by methylation of the appropriate secondary propargylamines, using [^14^C]dimethyl sulphate. This simple method should be generally applicable to other compounds of this class.
Substitution therapy with levodopa and a peripheral inhibitor of aromatic L-amino acid decarboxylase (AADC) is the cornerstone in the treatment of Parkinson's disease. Chronic therapy with levodopa, however, is associated with the occurrence of motor complications that are partially related to the p
Owing to an error at proof stage, the molecular structure in Figure 1 was published incorrectly. The revised version is now printed below.
The ionization and lipophilicity properties of the second-generation catechol-O-methyltransferase (COMT) inhibitors entacapone (1), nitecapone (2), and tolcapone (3) which share the same nitrocatechol structure but have remarkably different pharmacokinetic profiles are investigated to identify relat