Syntheses of seven alkoxymethyl complexes, M-CH2OR (R = Me, Et), from the corresponding metal formyls are described; the metals are manganese (compounds 1a-b, 2, and 3), rhenium (compounds 4 and 5), or molybdenum (compound 6). Four of these (1b and 3-5) are new compounds; the details of the syntheses of the other three have not been reported previously. Examples are given of three distinct synthetic routes; all routes require initiation by the action of an electrophile on the metal formyl complex. Variations in the procedures are dictated by the reactivity of the formyl complex and that of its protonated or alkylated form.