## Abstract An enzymatic synthesis of [^11^C] __N__‐acetylserotonin is described. [1‐^11^C] acetate is produced by reacting ^11^CO~2~ with methylmagnesium bromide and converted to [^11^C]acetylCoA by passage over a first enzyme reactor containing immobilized acetylcoenzyme A synthetase. The produce
A concise synthesis of [carbonyl-11C]melatonin and N-[carbonyl- 11C]acetylserotonin
✍ Scribed by Masao Tada; Atsushi Oikawa; Ren Iwata; Kazunori Sato; Hiroshi Sugiyama; Hiromu Takahashi; Akira Wakui; Hiroshi Fukuda; Kazuo Kubota; Yoshinao Abe; Tatsuo Yamaguchi; Takehiko Fujiwara; Tachio Sato; Tatsuo Ido
- Publisher
- John Wiley and Sons
- Year
- 1991
- Tongue
- French
- Weight
- 218 KB
- Volume
- 29
- Category
- Article
- ISSN
- 0022-2135
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✦ Synopsis
Abstract
Rapid chemical syntheses of [carbonyl‐ ^11^C]melatonin and N‐[carbonyl‐ ^11^C]acetylserotonin starting from [^11^C]carbon dioxide are described. The radiochemical yield (based on [carbonyl‐^11^C]‐acetic acid), purity, and the specific activity (end of bombardment) of the former are 12%, >98%, and 4.2 Ci/μmol, respectively. The latter is also synthesized with the same radiochemical yield, purity, and specific activity. The total times required for their syntheses are ca. 45 min, respectively.
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N a t i o n a l Laboratory, Upton, NY 11973 Received Sumary A r a p i d , one-pot, s y n t h e s i s of cyclopropane [ llC]carbonyl c h l o r i d e was developed. This s y n t h e s i s proceeded i n 807; r a d i ochemical y i e l d (EOB) i n a s y n t h e s i s time of LO minutes. This a c i d c h