In a 5 dM(3) stirred tank reactor, bioconversion of 30g benzaldehyde by cells of Torulaspora delbrueckii yielded 22.9g of pure L-phenylacetylcarbinol (L-PAC). Facile functional group transform, formation of 4.5g of L-PAC to 2-(methylimino)-1-phenyl-1-propanol by exposure to microwave irradiation for 9min resulted in 2.48g of product. Conversion of 4.8g of 2-(methylimino)-1-phenyl-1-propanol to 3.11g of ephedrine was achieved by exposure to microwaves in a reaction time of 10min. The identity of all the products was confirmed by H-1 NMR and FT-IR analysis.