Molbank 2007, M550 |
Synthesis of 1,2,5,7-dithiadiazonan-6-ylidenecyanamide.
A New Potential Cysteamine Derivate Radioprotector Compound
Enrique Angeles 1,*, Italo Menconi 1, Alberto Ram¨ªrez 1, Ana Mar¨ªa Vel¨¢zquez 1, Br¨ªgida Camacho 1, Gerardo Ord¨®nez 1, Ignacio Mart¨ªnez 1, Sandra D¨ªaz-Barriga 1, Rafael L¨®pez-Castañares 2
2 Facultad de Qu¨ªmica de la UAEM, Universidad Aut¨®noma del Estado de M¨¦xico.
* Author to whom correspondence should be addressed. E-mail: [email protected]
Received: 19 January 2007 /
Accepted: 24 February 2007 /
Published: 30 May 2007
Keywords: Cysteamine, radioprotector, nine member ring.
Radioprotectors have been described as a chemical compounds that protect certain normal tissues as opposed to tumors. [1] and have shown promise for protecting mammals against otherwise lethal effects of ionizing radiation; they are particular interest since they lack nitrogen, wich typically is present in antiradiation agents[2]. The action mechanism of radioprotectors is postulated that they act through their aminothiol derivative wich is libereted in vivo [3,4]. There has been reported in literature the synthesis of many radioprotector that interact with proteins [5] and also enhance its radiorpotective effect [6-8].Furthermore, the nucleophilic thiol grups present in radioprotectors, could also trap xenobiotic electrophilic intermediates originating from alkylating agents by formation of cavalent bonds.On the other hand some ciclic cysteamine radiportector realted compounds have been (I-IV) (Fig. 1).
1,2,5,7-dithiadiazonan-6-ylidenecyanamide
(3) was prepared from dithiomethylcyanourea (1) and cistamine
(2) in methanol as solvent . A
solution
of methanol (50 mL) and
sodium hydroxyde
was prepared and 1 (g, mmol)
in
methanol (mL) was added
and heated at
Melting point: 152-154 oC (ethanol, uncorrected).
IR (cm-1;
KBr
Disk) 3452 (N-H), 2220 (CN), 1609 (C=C).
1H-NMR (300 MHz; CDCl3; Me4Si, ¦ÄH): 9.50 (2H, s, NH), 3.76 (4H, m, N-CH2-), 3.52 (4H, m, -S-CH2-).
13C-NMR (75 MHz; CDCl3; ¦ÄC): 177.9 (C=N), 117.6 (CN), 47.42(-N-CH2-), 31.21 (-S-CH2-).
MS m/z (rel %):
202(1.0 %), 172 (100%)
Elemental Analysis: Calculated for C6H10N4S2 (202): C 35.62 %, H 4.98 %, N 27.70 %, S 31.77 % ; found : C 35.70 %, H 5.01 %, N 27.56 %, S 31.91 %.
Acknowledgements
The authors wish to acknowledge to PAPIIT/UNAM Proyect No IN213606 and ALPHARMA SA de CV, by partially support this work. We would like to thank C.Barajas F.Sotres and D.Jim¨¦nez for their skillful technical assistance and DGSCA-UNAM for their support. As a part of Proyect C¨¢tedra Qu¨ªmica Medicinal of FESC-UNAM.
© 2007 by MDPI (http://www.mdpi.org/). Reproduction is permitted for noncommercial purposes.