## D-Shikimic acids I-I4C, 6-14C and 7-(carboxyl) 14C have been biosyntheticaily prepared with specific activities of about 25 mCi/ mmole and with overall yields of 45% based on pyruvate 3,2 or I-1% as the respective starting materials. A crude cellfree homogenate of E. coli 83-24 was used to cat
Synthesis of 14C and 3H specifically labelled 1-benzyl-4- -picolinoyl-piperazine
✍ Scribed by G. Zólyomi; Z. Budai
- Publisher
- John Wiley and Sons
- Year
- 1981
- Tongue
- French
- Weight
- 262 KB
- Volume
- 18
- Category
- Article
- ISSN
- 0022-2135
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✦ Synopsis
Abstract
Specifically labelled 1‐benzyl‐4‐picolinoyl‐piperazine (4) was synthetized for use in metabolism studies. Carbon‐14 was introduced both in benzyl and picolinoyl groups, and tritium in the benzyl group. By using commercial n‐butyllithium in n‐hexane, the yield of picolinic acid was improved.
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## Abstract [^3^H]SCH 211803, at a specific activity of 1.56 Ci/mmol, was prepared by direct exchange with tritiated water and platinum metal. [^2^H~4~]SCH 211803 was prepared from [^2^H]formaldehyde in a seven step synthesis in 10% yield. [^14^C]SCH 211803 was prepared from __N__‐benzyl‐4‐hydroxy[
3H-Sch 47949, racemic 3H-Sch 48461, was prepared at a specific activity of 40 mCi/mmole by Pt catalysed exchange with tritiated water. 3H-Sch 48461 was prepared at a specific activity of 64.6 Ci/mmole by a Pd/C catalysed reduction of an olefinic intermediate. 14C-Sch 48461 was prepared in 8 steps fr