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2005
Benzopyran derivatives
R 0350
Silica Gel Supported InBr3 and InCl3: New Catalysts for the Facile and Rapid Oxof 2'-Hydroxychalcones and Flavanones to Their Corresponding Flavones
18- 125 idation
under Solvent Free Conditions. — Indium trihalides supported on silica gel are described as novel easily preparable and stable catalysts for the oxidation of o-hydroxychalcones and flavanones to flavones. The reaction with SiO2-supported InCl3 affords
lower yields compared to InBr3 (no details given). — (AHMED, N.; ALI, H.; VAN
LIER*, J. E.; Tetrahedron Lett. 46 (2005) 2, 253-256; Dep. Nucl. Med. Radiobiol.,
Fac. Med., Univ. Sherbrooke, Sherbrooke, Que. J1H 5N4, Can.; Eng.) — Mais
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