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Cyclotrimerization of 6-ethynylpurines. Synthesis of 1,2,4- and 1,3,5-tris(purin-6-yl)benzenes as novel Hoogsteen-triplet analogues
- 1.0194282 - UOCHB-X 20010127 RIV NL eng J - Journal Article
Hocek, Michal - Stará, Irena G. - Starý, Ivo - Dvořáková, H.
Cyclotrimerization of 6-ethynylpurines. Synthesis of 1,2,4- and 1,3,5-tris(purin-6-yl)benzenes as novel Hoogsteen-triplet analogues.
Tetrahedron Letters. Roč. 42, č. 3 (2001), s. 519-521. ISSN 0040-4039. E-ISSN 1873-3581
R&D Projects: GA ČR GA203/00/0036; GA ČR GA203/99/1448
Institutional research plan: CEZ:AV0Z4055905
Keywords : purines * cyclotrimerizations
Subject RIV: CC - Organic Chemistry
Impact factor: 2.280, year: 2001
Cyclotrimerization reactions of the 9-protected 6-ethynylpurines 4a,b in the presence Ni(COD)2 or Ni(COD)2/PPh3 gave the 1,2,4- and 1,3,5-tris(purin-6-yl)benzenes 5a,b and 6a,b in moderate to good yields (in a 4:1 to 10:1 ratio).
Permanent Link: http://hdl.handle.net/11104/0089965
Number of the records: 1