SwePub - sökning: WFRF:(Ojwach S. O.)

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1.	Ojwach, S. O., et al. (författare) Substituted (pyridinyl)benzoazole palladium complexes: Synthesis and application as Heck coupling catalysts 2007 Ingår i: Polyhedron. - : Elsevier BV. - 0277-5387. ; 26:18, s. 5544-5552 Tidskriftsartikel (refereegranskat)abstract The synthesis of 2-(4-tert-butylpyridin-2-yl)-benzooxazole (L3), 2-(4-tert-butyl-pyridin-2-yl)-benzothiazole (L4) and 6-tert-Butyl-2(4-tert-butyl-pyridin-2-yl)-benzothiazole (L5) by intramolecular cyclization under basic conditions is described. Reactions of 2-pyridin-2-yl-1H-benzoimidazole (L2), 2-pyridin-2-yl-benzothiazole (L2) and L3-L5 with either [Pd(NCMe)(2)Cl-2)] or [Pd(COD)MeCl] afforded the corresponding mononuclear palladium complexes [Pd(L1)MeCl] (1), [Pd(L2)MeCl] (2), [Pd(L3)Cl-2] (3), [Pd(L3)MeCl] (4), [Pd(L4)Cl-2] (5), [Pd(L4)MeCl] (6) and [Pd(L4)MeCl] (7) as confirmed by mass spectrometry and elemental analyses. The palladium complexes are efficient Heck coupling catalysts for the reaction of iodobenzene with butylacrylate under mild conditions. Benzothiazole and benzooxazole containing complexes show faster induction periods compared to the benzoimidazole analogues. (C) 2007 Elsevier Ltd. All rights reserved.

Ojwach, S. O., et al. (författare)
Substituted (pyridinyl)benzoazole palladium complexes: Synthesis and application as Heck coupling catalysts
2007
Ingår i: Polyhedron. - : Elsevier BV. - 0277-5387. ; 26:18, s. 5544-5552
Tidskriftsartikel (refereegranskat)abstract
- The synthesis of 2-(4-tert-butylpyridin-2-yl)-benzooxazole (L3), 2-(4-tert-butyl-pyridin-2-yl)-benzothiazole (L4) and 6-tert-Butyl-2(4-tert-butyl-pyridin-2-yl)-benzothiazole (L5) by intramolecular cyclization under basic conditions is described. Reactions of 2-pyridin-2-yl-1H-benzoimidazole (L2), 2-pyridin-2-yl-benzothiazole (L2) and L3-L5 with either [Pd(NCMe)(2)Cl-2)] or [Pd(COD)MeCl] afforded the corresponding mononuclear palladium complexes [Pd(L1)MeCl] (1), [Pd(L2)MeCl] (2), [Pd(L3)Cl-2] (3), [Pd(L3)MeCl] (4), [Pd(L4)Cl-2] (5), [Pd(L4)MeCl] (6) and [Pd(L4)MeCl] (7) as confirmed by mass spectrometry and elemental analyses. The palladium complexes are efficient Heck coupling catalysts for the reaction of iodobenzene with butylacrylate under mild conditions. Benzothiazole and benzooxazole containing complexes show faster induction periods compared to the benzoimidazole analogues. (C) 2007 Elsevier Ltd. All rights reserved.

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