6-(chloromethyl)-4-(3-methoxypropyl)-2H-benzo[b][1,4]oxazin-3(4H)-one → tert-Butyl 4-{4-[3-(4-fluorophenoxy)propoxy]phenyl}-3-[4-(3-methoxypropyl)-3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-ylmethoxy]piperidine-1-carboxylate

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Analogously to Method D, 0.600 g of tert-butyl 4-{4-[3-(4-fluorophenoxy)propoxy]phenyl}-3-hydroxypiperidine-1-carboxylate and 0.408 g of 6-chloromethyl-4-(3-methoxypropyl)-4H-benzo[1,4]oxazin-3-one (Example 2a) are reacted. The title compound is obtained as a yellowish oil. Rf=0.17 (1:2 EtOAc-heptane); Rt=5.82.

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