silica gel supported tabr5: new catalyst for the facile and rapid cyclization of 2′-aminochalcones...

2006 Quinoline derivatives R 0410 Silica Gel Supported TaBr 5 : New Catalyst for the Facile and Rapid Cyclization of 2'-Aminochalcones to the Corresponding 2-Aryl-2,3-dihydroquinolin-4(1H)-ones under Solvent-Free Conditions. — The reaction allows the rapid synthesis of 2,3-dihydroquinolin-4(1H)-ones through cyclization of 2'-aminochalcones. Attempted cyclization of 2'-hydroxychalcones gives only low yields. — (AHMED, N.; VAN LIER*, J. E.; Tetrahedron Lett. 47 (2006) 16, 2725-2729; Dep. Nucl. Med. Radiobiol., Fac. Med., Univ. Sherbrooke, Sherbrooke, Que. J1H 5N4, Can.; Eng.) — Mais 31- 126

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Page 1: Silica Gel Supported TaBr5: New Catalyst for the Facile and Rapid Cyclization of 2′-Aminochalcones to the Corresponding 2-Aryl-2,3-dihydroquinolin-4(1H)-ones under Solvent-Free Conditions

2006

Quinoline derivativesR 0410 Silica Gel Supported TaBr5: New Catalyst for the Facile and Rapid Cyclization of

2'-Aminochalcones to the Corresponding 2-Aryl-2,3-dihydroquinolin-4(1H)-ones under Solvent-Free Conditions. — The reaction allows the rapid synthesis of 2,3-di-hydroquinolin-4(1H)-ones through cyclization of 2'-aminochalcones. Attempted cy-clization of 2'-hydroxychalcones gives only low yields. — (AHMED, N.; VAN LIER*, J. E.; Tetrahedron Lett. 47 (2006) 16, 2725-2729; Dep. Nucl. Med. Radiobiol., Fac. Med., Univ. Sherbrooke, Sherbrooke, Que. J1H 5N4, Can.; Eng.) — Mais

31- 126

Efficient Synthesis of 2,3-Dihydro-1H-pyrazoles via a …S1 Efficient Synthesis of 2,3-Dihydro-1H-pyrazoles via a Highly Selective Pd(0)-Catalyzed Coupling-Cyclization Reaction of

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Gold-Catalyzed Cyclization Reactions of Allenes