Synthesis of a 13C,15N labeled imidazole and characterization of the 2,5-endoperoxide and its decomposition
✍ Scribed by Ping Kang; Christopher S Foote
- Publisher
- Elsevier Science
- Year
- 2000
- Tongue
- French
- Weight
- 55 KB
- Volume
- 41
- Category
- Article
- ISSN
- 0040-4039
No coin nor oath required. For personal study only.
✦ Synopsis
A synthesis of 13 C, 15 N labeled imidazoles was developed which allows the direct detection of a transient 2,5-endoperoxide at -100°C. The endoperoxide was thoroughly characterized by 1 H, 13 C, and 15 N NMR. Upon warming, the endoperoxide decomposes via a series of transient intermediates to 13 CO 2 and 1,2-diphenyl-ethanediimine.
📜 SIMILAR VOLUMES
## Abstract Four isotopically labeled, metabolically stable analogs of arachidony‐lethanolamide (anandamide), an endogenous cannabinoid ligand, were synthesized via a five‐step reaction sequence starting from arachidonic acid. These stable methanandamide derivatives will serve as probes for studyin
## Abstract A method was developed for the synthesis of triple (^13^C~2~, ^14^N) labeled trimetrexate. A method for single carbon‐14 labeled synthesis is also described. Modifications of the triple labeled synthesis with carbon‐14 produced a doubled carbon‐14 labeled trimetrexate.
## Abstract We have developed a stereospecific biosynthesis of ^13^C‐ and ^15^N‐labeled L‐serine which involves the serine‐type methylotroph __Methylobacterium extorquens__ AM1. In this biosynthesis, C‐3 of serine is derived from methanol while C‐2, C‐1 and the α‐amino group are derived from glycin
The all-E isomer of (4,4Ј-13 C 2 )astaxanthin (1a) has been prepared by total synthesis starting from commercially available 99% 13 C enriched acetonitrile. The labelled astaxanthin was obtained in high purity and with high isotope incorporation. For this synthesis, the C 15 + C 10 + C 15 strategy w