“…The monoacetate could be hydrolyzed to the c/s-diol which was then converted to the acetonide 67 and the diacetate.49 When the acetolysis was carried out in a mixture of acetic anhydrideacetic acid in the presence of silver acetate, /rani-1 ,2-diacetoxybenzocyclobutene (64) was obtained in 82% yield. This was converted to the pure /rani-1,2-diol 65 which was unstable upon heating in contrast to the cis isomer.…”