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Title:
METHOD FOR RAPIDLY METHYLATING HETEROAROMATIC RING ARYL AND METHOD FOR PRODUCING PET TRACER
Document Type and Number:
WIPO Patent Application WO/2010/074272
Kind Code:
A1
Abstract:
Provided is a method whereby a heteroaromatic ring aryl can be very rapidly methylated at a high yield. In an N-alkyl-2-pyrrolidinone, a heteroaromatic ring aryltrialkylstannan is cross-coupled with methyl iodide in the presence of a palladium complex, a phosphine ligand, a cuprous halide, a carbonic acid salt and/or an alkali metal fluoride to thereby rapidly methylate the heteroaromatic ring aryl.  (Formula shows a case wherein the heteroaromatic ring aryl is a pyridyl group.)

Inventors:
SUZUKI MASAAKI (JP)
DOI HISASHI (JP)
KOYAMA HIROKO (JP)
Application Number:
PCT/JP2009/071694
Publication Date:
July 01, 2010
Filing Date:
December 25, 2009
Export Citation:
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Assignee:
UNIV GIFU (JP)
RIKEN (JP)
SUZUKI MASAAKI (JP)
DOI HISASHI (JP)
KOYAMA HIROKO (JP)
International Classes:
C07D213/127; A61K51/00; C07D217/02; C07D231/12; C07D237/08; C07D239/26; C07D307/36; C07D333/08; C07B61/00
Domestic Patent References:
WO2007046258A12007-04-26
WO2007046258A12007-04-26
WO2008023780A12008-02-28
Other References:
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BENNACEF, I. ET AL.: "Functionalization through Lithiation of (S)-N-(1-Phenylpropyl)-2- phenylquinoline-4-carboxamide. Application to the Labeling with Carbon-11 of NK-3 Receptor Antagonist SB 222200", JOURNAL OF ORGANIC CHEMISTRY, vol. 72, no. 6, 2007, pages 2161 - 2165, XP002509397
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FARINA, V. ET AL.: "Large rate accelerations in the stille reaction with tri-2-furylphosphine and triphenylarsine as palladium ligands: mechanistic and synthetic implications", JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, vol. 113, no. 25, 1991, pages 9585 - 9595, XP002923480
MEE, S.P. ET AL.: "Stille coupling made easier - the synergic effect of copper(I) salts and the fluoride ion", ANGEWANDTE CHEMIE, INTERNATIONAL EDITION, vol. 43, no. 9, 2004, pages 1132 - 1136, XP003012119
See also references of EP 2383258A4
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Attorney, Agent or Firm:
AOYAMA, Yo (JP)
Aoyama Sun (JP)
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