反应详情

Compound 4 is prepared in two steps from commercially available 3,3′,4,4′-biphenyltetracarboxylic dianhydride as shown in Scheme 4. Dianhydride is reduced with lithium aluminium hydride in dioxane to give 3,3′,4,4′-tetra(hydroxymethyl)-1,1′-biphenyl 3, which is in turn oxidised following a standard swern oxidation procedure to afford tetracarbaldehyde 4.