Is this specific compound the only one you are interested in, or will you want to make other derivatives too? N-chloroethylmorpholine is commercially available, so the synthesis suggested is clearly the way to go for your one target, but if you want to produce a series of morpholine analogs it would require repeatedly running reactions with dichloroethane (carcinogenic and relatively volatile) and separating a side product (R1R2NCH2CH2NR1R2) in each case.