A synthesis of 3-cyano-4-methyl-5 ( 14 C)-methyl-2-(5-14C)pyrrolyloxamic acid is described. The compound, having specific activity of 66.7 pCi/mmole, was obtained in 19.68% overall yield from uniformly labelled 14C-l-alanine. 14 14 Key Words: 3-Cyano-4-methyl-5( C)-methyl-2-(5-C)pyrrolyloxamic acid,
[5-14C]-4-methyltriazolepyridines via facile preparation of methyl-[14C]-isothiocyanate
✍ Scribed by Peter Ström; Jonas Malmquist
- Publisher
- John Wiley and Sons
- Year
- 2008
- Tongue
- French
- Weight
- 113 KB
- Volume
- 51
- Category
- Article
- ISSN
- 0022-2135
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✦ Synopsis
Abstract
A fast and convenient microwave assisted one‐pot synthesis of methyl‐[^14^C]‐isothiocyanate 4 was shown. The continued one‐pot synthesis with 4 to a highly refined material like [5‐^14^C]‐dimethylsulfanyltriazolepyridines 8 and 13 without any intermediate purification, six steps in the same pot from [^14^C]KCN. Oxidation of the sulfur provided access to triazole‐ethers upon reaction with alcohols. The triazole‐ethers, 15, were obtained at fair to good yields and specific activities above 2 GBq/mmol. Copyright © 2008 John Wiley & Sons, Ltd.
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