## Abstract RPCNU was labelled with ^14^C on three positions: ‐ On the carboxyl of the acetyl groups ‐ On the carboxyl of the acetyl groups ‐ On the urea carbonyl
Synthesis of 4-tert-butyl-3-(2-chloro -[-2-14C]ethyl)ureido benzene
✍ Scribed by El-mostafa Azim; Jean-Michel Dupuy; Jean-Claude Maurizis; René C. Gaudreault; Annie Veyre; Jean-Claude Madelmont
- Publisher
- John Wiley and Sons
- Year
- 1997
- Tongue
- French
- Weight
- 340 KB
- Volume
- 39
- Category
- Article
- ISSN
- 0022-2135
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📜 SIMILAR VOLUMES
## Abstract The title compound (1) was synthesized by a 7‐step sequence. 4‐Amino‐2‐hydroxy‐[carbonyl‐^14^C]benzoic acid (1) was selectively methylated to provide the ether ester 2, which was smoothly chlorinated in acetic acid to give 3. The ester was hydrolyzed with aqueous potassium hydroxide to
## Abstract 4‐|2‐(Dimethylamino)ethyl‐2‐^14^C| phenol (hordenine‐α‐^14^C) has been synthesised in three steps from |^14^C|potassium cyanide and __p__‐benzyloxybenzyl chloride which in turn was obtained in four steps from __p__‐hydroxybenzoic acid.
4-[2-(Di -n-pr yl amino)et hyl l-2 (3H)-indolone ( 1 ) labeled with ? !C at C2 was prepared by a simple and efficient procedure involving carbonation o f a stabilized benzvllithium species. fol owed by ring closure under hydrolytic conditions.
## Abstract The synthesis of 1,1,3,3‐tetraethoxypropane‐1,2,3‐^14^C~3~ from uniformly labeled paraldehyde is described. The synthesis involves three steps and proceeds in an overall yield of 25%. The final product is greater than 95% radiochemically pure and it is stable indefinitely when stored as
## Abstract ^14^C‐Labelled __N__‐(2‐chloro‐3,4‐dimethoxybenzylideneamino)guanidinium acetate has been synthesized as a part of a four‐step procedure which involved decarboxylation of 2‐chloro‐3,4‐dimethoxybenzoic acid by Pb(OAc)~4~ to give 2‐chloro‐3,4‐dimethoxy‐1‐iodobenzene, followed by a selecti