## Abstract The fumarase inhibitor, bromomescaconic acid, has been synthesized with ^13^C labeling in the bromomethyl group. Di‐t‐butyl acetylene‐dicarboxylate was converted with Li (^13^CH~3~)~2~Cu to di‐t‐butyl (methyl‐^13^C)citraconate. Photochemical isomerization of this to di‐t‐butyl (methyl‐^
A novel synthesis of fumaric acid-1-14C
✍ Scribed by Herman Rutner; Raul Rapun
- Publisher
- John Wiley and Sons
- Year
- 1973
- Tongue
- French
- Weight
- 227 KB
- Volume
- 9
- Category
- Article
- ISSN
- 0022-2135
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
A simple, two‐step synthesis of fumaric acid‐1‐^14^C from radioactive potassium cyanide and methyl 2‐chloroacrylate is described. The intermediate products, methyl cis and trans 3‐cyanoacrylates and the cis and trans 3‐cyanoacrylic acids, were hydrolyzed directly to fumaric acid‐1‐^14^C in 55‐60% yields. D, L‐malic acid‐COOH‐^14^C was also obtained as a byproduct in 9% yield. A reaction mechanism is proposed.
📜 SIMILAR VOLUMES
## Abstract The title work proceeds in five steps and 16% overall yield from sodium [1‐^14^C]acetate, which was converted by bromination followed by ethoxide displacement and reaction with phthaloyl dichloride to ethoxy[1‐^14^C]acetyl chloride. The thermal[2+2]cycloaddition of tetraethoxyethene wit
## 14 A method was developed to synthesize C-labelled n-qtkanes for use in cigarette smoke studies. Specifica],ly, n-[18-Cloctatriacontane was synthesized from 1 mCi [l-Clstearic acid in a radiochemical yield of 20%. synthesis were two consecutive alkylations yf tosylmethyl isocyanide followed by
## Abstract A growing interest in the phytotoxic effects of trichloroacetic acid (TCA) has led us to develop a small‐scale (<1 mmol) one‐pot synthesis of [1,2‐^14^C]TCA with >70% yield and specific activity of 3.7 GBq/mmol. Copyright © 2001 John Wiley & Sons, Ltd.
1-14C-Ca oxy]-4-benzoylbenzoic acid has been prepared v i a a Grignard r e a c t i o n w i t h %Oz. 4-Bromobenzophenone was converted t o (4-braopheny1)phenyldichloranethane using phosphorus pentachloride. was reacted w i t h methoxide i o n t o form 4-bromobenzophenone dimethyl k e t a l which was