Molbank 2007, M530 |
Synthesis of Ethyl [4-(2-chlorobenzyl)-3-methyl-6-oxopyridazin-1(6H)-yl]acetate
Nour-Eddine Benchat *, Abderrahmane
Anaflous, Said Abouricha, Mohammed
Ramdani and Brahim El-Bali
Department of Chemistry, University
Mohamed I, Sciences Faculty, 60000
*Author to whom correspondence should be addressed. E-mail: [email protected]
Received: 3 January 2006 / Accepted: 24 June 2006 / Published: 31 May 2007
Keywords:
pyridazin-3(2H)-one, N-alkylation, anticonvulsive agents.
Pyridazines
are of chemical and biological interest. They have been reported to be
anticonvulsive agents [1], Furthermore, Gehrlein et al. have described the antihypertensive effects
of novel hydroxyethylpyridazine compounds [2]. In
continuation of this line of investigation, we have synthesized compound (I); it will be subjected to further
pharmacological investigations, especially tests of its anticancer activity.
The product
(II) was prepared from
5-(2-chlorobenzyl)-6-methylpyridazin-3(2H)-one (I) in situ by the solid-liquid PTC conditions without solvent
[3]. To pyridazin (I) (
Melting point: 89-
IR (KBr,
cm-1): 1747 (CO2Et), 1670 (C=O), 1605, 1470, 1210 (C = N)
1H-NMR (300.14 MHz, CDCl3) d (ppm): 1.28 (t, J =
7.5 Hz, 3H, CH3), 2.31(s, 3H, CH3), 3.38 (s, 2H, CH2),
4.25 (q, J = 5 Hz, 2H, CH2), 4.82 (s, 2H, CH2), 6.32 (s,
1H, H4), 7.20 (m, 4H, aromatic protons).
13C-NMR (75 MHz, CDCl3) d (ppm):14.11 (CH3),
19.03 (CH3) 35.77 (CH2), 52.68 (CH2), 61.66
(CH2), 127.71 (CH o), 127.42(CH aromatic), 129.02 (CH aromatic),
130.02 (CH aromatic), 131, 12 (CH aromatic) 134.43, 144.97, 145.17, 160.30
(C3), 167.72 (C=O).
MS m/z (%) (M+1)+ =
321.5, 279, 275,219.
References:
1. Foussard-Blanc, P.; Lacroix, R. Moniteur Int. 1991, 25, 71-84.
2. Gehrlein, L.; Powers, L.J.; Eckert, D.J. J. Pharm. Sci. 1981, 70, 419-422.
3.
(a) Kappe,
C.O.; Dallinger, D. Nature Reviews Drug Discovery 2006, 5, 51; (b) De
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