Model Compounds Related to Saquayamycin. Attempts to Oxygenate the A/B Ring Junction
作者:M. A. Apponyi、J. H. Bowie、B. W. Skelton、A. H. White
DOI:10.1071/ch02040
日期:——
of 9a-bromo-3,3-dimethyl-7,9-dioxoperhydrobenzo[e]oxi- reno[2,3-f]isobenzofuran-1-yl acetate (12), respectively. It was then hoped to deprotonate both (7) and (12) at the 9a position in order to effect migration of the 8,9 double bond to the 9,9a position. Reaction of (7) with a mild base (pyridine) did not effect any reaction. Similar treatment of (12) did remove the 9a proton, but it also effected