M. Fierros et al., FIRST REGIOSELECTIVE MUCOR-MIEHEI LIPASE-CATALYZED SYNTHESIS OF DIESTER CROWNS - NEW MACROCYCLES CONTAINING A 1,3-BIS(1H-PYRAZOL-1-YL)PROPANE UNIT, Bioorganic & medicinal chemistry letters, 4(21), 1994, pp. 2523-2526
Diester crowns 4a-c have been prepared for the first time by regiosele
ctive lipase-catalyzed transesterification. The synthesized new ester
crowns include a 1,3-bis(1H-pyrazol-1-yl)propane unit as a part of the
macrocycle. Acyclic intermediates 3a-c were also obtained.