Some observations on the reductive ring opening of 4,6-O-benzylidene acetals of hexopyranosides with the borane trimethylamine–aluminium chloride reagent
作者:Katalin Daragics、Pál Szabó、Péter Fügedi
DOI:10.1016/j.carres.2011.04.046
日期:2011.9
Reductiveringopenings of 3-O-benzoyl-4,6-O-benzylidene-D-glucopyranosides with BH(3).NMe(3)-AlCl(3) are accompanied by side reactions, such as debenzoylation and reduction of the benzoate to benzyl ether. This phenomenon was rationalized by aluminium chelate formation between the O-4 acetal and the benzoyl carbonyl group oxygens. It was also shown that these side reactions can be eliminated by using