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2005
Isoquinoline derivatives
R 0420
Unexpected Formation of 1,2-Dihydro-2-azolyl- and -azinylisoquinolines by the
of the Corresponding Isoquinolinium Salts with Sodium Borohydride
19- 163 Reduction
in Methanol. — Surprisingly, the reduction of isoquinolinonium chlorides (I) bearing
an electron-withdrawing group (heterocycle) in position 2 of the isoquinolinium moiety
affords 1,2-dihydroisoquinoline derivatives. These results are corroborated by reduction of 2-phenylisoquinolines like (If) and (III) having both, electron withdrawing and
donating groups on the phenyl moiety. — (PRAUDA, I.; TOTH-LAURITZ, M.;
REITER, J.; J. Heterocycl. Chem. 41 (2004) 6, 915-929; EGIS Pharm. Ltd.,
H-1475 Budapest, Hung.; Eng.) — Bartels
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