... Journal of Molecular Catalysis B: Enzymatic. ... For example, the molecular sieves are added to absorb the water produced upon reaction, however this approach is problematic in large scale ... 1 H NMR (CDCl 3 , 200 MHz) ɛ 1.29–1.36 (t, J = 7.0 Hz, 3H), 3.86 (s, 3H), 4.21–4.32 (q, J ...