Abstract
Triflic anhydride was found to be efficient for the cyclotrimerization of dialkylcyanamides under mild conditions. The same reaction can be applied to aryl nitriles and thiocyanates.
Key words
s -triazines - cyanamides - triflic anhydride - cyclotrimerization - Lewis acid
References
1 Nishimura N.
Kato A.
Maeba I.
Carbohyd. Res.
2001,
331:
77
2 Burkhard K.
Steward M.
Barret MP.
Brun R.
Gilbert IH.
J. Med. Chem.
2001,
44:
3440
3 Iino Y.
Karakida T.
Sugamata N.
Andoh T.
Takei H.
Takahashi M.
Yaguchi S.
Matsumo Y.
Takehara M.
Sakato M.
Kawashina S.
Morishita Y.
Anticancer Res.
1998,
18:
171
4 Lee CH.
Yamamoto T.
Bull. Chem. Soc. Jpn.
2002,
75:
615
5 Paul P.
Tyagi B.
Bilakhiya AK.
Dastidar P.
Suresh E.
Inorg. Chem.
2000,
39:
14
6 Santra PK.
Sagar P.
J. Mol. Catal. A: Chem.
2003,
197:
37
7 Llobera A.
Saa JM.
Peralta A.
Synthesis
1985,
95
8 Anderson HL.
Anderson S.
Sanders JKM.
J. Chem. Soc., Perkin Trans. 1
1995,
2231
9 Katrizky AR.
Rees CW.
Comprehensive Heterocyclic Chemistry
Pergamon;
Oxford:
1996.
Chap. 3.
p.73 ; and references therein.
10 Forsberg JH.
Spaziano VT.
Klump SP.
Sanders KM.
J. Heterocycl. Chem.
1988,
25:
767
11 Xu F.
Sun J.-H.
Yan B.-H.
Shen Q.
Synth. Commun.
2000,
30:
1017
12 Xu F.
Zhu X.-H.
Shen Q.
Lun J.
Li J.-Q.
Chin. J. Chem.
2002,
20:
1334
13 Katrizky AR.
Onicin DC.
Ghiviriga I.
Barcock RA.
J. Chem. Soc., Perkin Trans. 2
1995,
785
14 Herrera, A.; Martinez-Alvarez, R.; Chioua, R.; Benabdelouahab, F.; Chioua, M. Tetrahedron submitted for publication.
15 García Martínez A.
Herrera Fernández A.
Moreno Jimenez F.
Martinez Ruiz P.
Subramanian LR.
Synlett
1995,
161
16 Stang PJ.
Hanack M.
Subramanian LR.
Synthesis
1982,
85
