## Abstract A fast, clean and reproducible method for the manufacture of the radiotracer L‐[methyl‐^11^C]methionine is reported. The reaction at room temperature of the non‐radioactive precursor L‐homocysteine (1 mg solution in ethanol/water 50/50) with [^11^C]CH~3~I in an HPLC loop led to the form
Asymmetric carboxylation in the synthesis of l-methionine: a new tool for 11C chemistry
✍ Scribed by Fabien Jeanjean; Nathalie Perol; Jacques Goré; Guy Fournet
- Publisher
- Elsevier Science
- Year
- 1997
- Tongue
- French
- Weight
- 473 KB
- Volume
- 38
- Category
- Article
- ISSN
- 0040-4039
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✦ Synopsis
L-methionine is obtained in good yield and high e.e. by using the carboxylation of an enantiopurecr-lithiooxazolidinonepreparedby tin-lithiumexchange.The entire processfrom cs-stannyl oxazolidinonetakes 35-40mn,time which is compatiblewitb the use of 11C02in radioactive chemistry directedto PET imaging. @ 1997Published by EIsevierScience Ltd.
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