... For DM-T.: phone, +34 + 934024536 ; fax, + 34 + 934035941; e-mail, dmunoztorrero@ub.edu., † ... of 5,6-dimethoxy-1-indanone with pyridine-4-carboxaldehyde in the presence of p-TsOH·H ... tacrine hybrids 14−15a,b and the indane derivatives 16−17a,b in low to moderate yields ...