1,4-Dibromobutane → 1-(4-Bromobutoxy)-4-methoxybenzene

Participants

Reaction Steps

Condensation of 1,4-dibromobutane with 4-methoxyphenol according to A. M. Ismaiel et al. (J Med Chem (1993) 36, 2519-25) gives an 82% yield of 1-(4-methoxyphenoxy)-4-bromobutane. By condensing 670 mg (2.58 mmol) of this derivative with 700 mg (2.35 mmol) of N-methyl-N-[4-piperidyl]-4H-3,1-benzothiazin-2-amine, obtained in Example 16-2, in 8 ml of dry DMF in the presence of 630 mg (5.8 mmol) of 98 Na2CO3 /02 KI according to the procedure of Example 16-3, the compound of formula 22 is prepared in a yield of 58%: ##STR46##

Provenance & Evidence