𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Synthesis of 14C-hydroxyurea with immobilized 14C-cyanate

✍ Scribed by Alfred M. Ajami


Publisher
John Wiley and Sons
Year
1983
Tongue
French
Weight
173 KB
Volume
20
Category
Article
ISSN
0022-2135

No coin nor oath required. For personal study only.

✦ Synopsis


Abstract

A solution of hydroxylamine hydrochloride is passed over a column bed of Amberlite IRA‐400 pre‐loaded with ^14^CNO^−^ anions. ^14^C‐hydroxyurea is formed in 50% radiochemical yield after recrystallization. The product is not contaminated with iso‐hydroxyurea or other by‐products usually found in the reaction of hydroxylamine hydrochloride with aqueous potassium cyanate.


📜 SIMILAR VOLUMES


Synthesis of daunorubicin-14-14C and adr
✍ C. Rolland Chen; Mary Tan Fon; Alan N. Fujiwara; David W. Henry; Morris A. Leaff 📂 Article 📅 1978 🏛 John Wiley and Sons 🌐 French ⚖ 275 KB

## Abstract Reaction of adriamycinone with excess ^14^CH~3~Mgl and periodate cleavage of the resulting glycol (5) affords daunomycinone‐14‐^14^C (6). Bromination and hydrolysis of 6 gives adriamycinone‐14‐^14^C (8). Coupling of 6 and the 14‐0‐p‐anisyldiphenyl‐methyl derivative (9) with 1‐chloro‐3‐N

Synthesis of 14-14C-adriamycin
✍ Babu R. Vishnuvajjala; Tadashi Kataoka; Frederick D. Cazer; Donald T. Witiak; Lo 📂 Article 📅 1978 🏛 John Wiley and Sons 🌐 French ⚖ 249 KB

14-14C-Adriamycin HC1 has been prepared from unlabeled adriamycin. The 14C-Diazald served as the source of the label. This synthesis does not require protection of the phenolic hydroxyl groups.

Synthesis of 14C-lanosterol and 14C-desm
✍ B. Danieli; G. Russo 📂 Article 📅 1965 🏛 John Wiley and Sons 🌐 French ⚖ 296 KB

The synthesis of lanosterol [la] and desmosterol [Ira] Iabeled with 14C in the 25 position by a Wittig reaction between triphenyl-214C isopropylidene-phosphorane [IVb] and the corresponding aldehydes are described. The specijic activities obtained are, respectively, 0.539 mClmM and 0.752 mClmM and t

Pesticides labelled with 14C III. Synthe
✍ Ernö Koltai; Ferenc Kling; György Rutkai 📂 Article 📅 1996 🏛 John Wiley and Sons 🌐 French ⚖ 178 KB 👁 1 views

14C labelled Metribuzine was synthetised in a five step synthesis firom sodium [l-14C]pivalate (trimethyl acetic acid) via o-brom0-[2-~~C]pinacoline (l-bromo-3,3-dimethyl-butan-2-on) and trimethyl [2-14C]pyruvic acid. The total yield was 30% (calculated on sodium pivalate).

Pesticides labelled with 14C I. Synthesi
✍ Ernǒ Koltai; György Rutkai; Ferenc Kling 📂 Article 📅 1995 🏛 John Wiley and Sons 🌐 French ⚖ 148 KB

## Abstract Hexazinone ‐ a s‐triazine type contact herbicide ‐ was labelled with ^14^C for the investigation of metabolic pathways. A convenient synthesis was elaborated for labelling of the carbon atom in the 6 position of the triazine ring. The molar activity of Hexazinone was 797.0 MBq/mmole (21