D 2865 (OTTO) (R)-1-[(SP)-2-(Diphenylphosphino)ferrocenyl]ethyldi-tert-butylphosphine, 97% Cas 155830-69-6 - used as a ligand in the palladium-catalyzed alkoxycarbonylation of 6-bromo-1,4-benzodioxane with sodium tert-butoxide to form the corresponding tert-butyl ester.