反应详情

Treatment of 4-hydroxy-4-(α-hydroxy-4-trifluoromethyl-2-tolyl)-1-methylpiperidine with hydrochloric acid by the method described in Example 16d provides 1,3-dihydro-1'-methyl-6-trifluoromethylspiro[isobenzofuran-1,4'-piperidine].