𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Acid catalyzed tritium exchange of activated aromatic protons

✍ Scribed by Richard R. Muccino; Lucia Serico

Publisher
John Wiley and Sons
Year
1978
Tongue
French
Weight
131 KB
Volume
15
Category
Article
ISSN
0022-2135

No coin nor oath required. For personal study only.

✦ Synopsis

A technique is described for the acid catalyzed tritium exchange of activated aromatic protons using acetic acid-HI tritium chloride. In the two examples reported, specific activities of 0.5 Ci/rmnol were obtained for propranolol and 1.73 Ci/mmol for reserpine. be very effective and easily manipulated under vacuum.

📜 SIMILAR VOLUMES

Acid-catalyzed deuterium exchange of aro
Acid-catalyzed deuterium exchange of aromatic protons. Part III1: Accelerated exchange by microwave irradiation
✍ G. J. Köves 📂 Article 📅 1994 🏛 John Wiley and Sons 🌐 French ⚖ 340 KB

## Abstract Conventional acid‐catalyzed ^2^H/^1^H exchange in aromatic rings requires long reaction times, high temperatures and pressure. This paper reports that accelerated deuterium exchange can be achieved in a microwave oven. Experiments were carried out on benzodiazepines, tricyclic antidepre

Proton exchange and protonation of subst
Proton exchange and protonation of substituted oxadiazoles in trifluoroacetic acid
✍ Mohindar S. Puar; Allen I. Cohen 📂 Article 📅 1972 🏛 John Wiley and Sons 🌐 English ⚖ 310 KB

## Abstract The rates of NHCOOH proton exchange between 5‐amino‐(**1a**) and 5‐__N__‐methylamino‐(**1b**)3‐[2‐(5′‐nitro‐2′‐furyl)vinyl]‐1,2,4‐oxadiazoles and trifluoroacetic acid (TFA) have been measured by NMR spectroscopy. The values of the first‐order rate constant and thermodynamic parameters

NMR of anthocyanins: Assignments and eff
NMR of anthocyanins: Assignments and effects of exchanging aromatic protons
✍ Atle T. Pedersen; Øyvind M. Andersen; Dagfinn W. Aksnes; Willy Nerdal 📂 Article 📅 1993 🏛 John Wiley and Sons 🌐 English ⚖ 459 KB

## Abstract Pelargonidin‐3‐__O__‐β‐glucopyranoside was isolated from an acidified methanolic extract of frozen strawberries, purified by several chromatographical techniques and subjected to homo‐ and heteronuclear proton and carbon NMR analysis, including selective decoupling, DQF‐COSY, NOESY, SEF