A convenient synthesis of 13N-labelled azo compounds: a new route for the preparation of amyloid imaging PET probes.

Abstract:

:In the present paper, a fast and automated method for the synthesis of (13)N-labelled azo compounds is reported for the first time. The labelling strategy is based on trapping [(13)N]NO(2)(-) in an anion exchange resin. The reaction with primary aromatic amines in acidic media led to the formation of the corresponding diazonium salts, which were further reacted with aromatic amines and alcohols to yield the corresponding (13)N-labelled azo derivatives with good radiochemical conversion (40.0-58.3%). Good radiochemical yields (20.4-47.2%, decay corrected) and radiochemical purities (>99.9%) were obtained after purification by HPLC. Such methodology can be easily applied to the preparation of a wide range of (13)N-labelled azo derivatives by adequate selection of the non-radioactive precursors.

journal_name

Eur J Med Chem

authors

Gómez-Vallejo V,Borrell JI,Llop J

doi

10.1016/j.ejmech.2010.08.053

subject

Has Abstract

pub_date

2010-11-01 00:00:00

pages

5318-23

issue

11

eissn

0223-5234

issn

1768-3254

pii

S0223-5234(10)00634-3

journal_volume

45

pub_type

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