... Aliquots of the reaction mixture (100 μL) were withdrawn every 30 min, mixed with an equal volume of the mobile phase of HPLC analysis (40 ... (a) K. Drauz, H. Waldman (Eds.), Enzyme Catalysis in Organic Synthesis (2nd ed.), Vol. ... Tetrahedron: Asymmetry, 14 (2003), p. 147. ...