. "(wherein R3 and m are defined above), with a compound of general formula R1(CH2)n???X wherein R1 is other than H and is defined above, n is an integer ranging from 1 to 4 and X is a leaving group such as a benzenesulfonate, 4-methylbenzenesulfonate, 4-bromobenzenesulfonate, 4-nitrobenzenesulfonate, methanesulfonate, trifluoromethanesulfonate, or halogen in the presence of a strong base such as lit" . . .