Kinetic resolution of primary alcohols having remote stereogenic centers: lipase mediated kinetic resolution of (±)-3-chloro-3-arylpropanols
作者:Alper Isleyen、Cihangir Tanyeli、Özdemir Dogan
DOI:10.1016/j.tetasy.2006.06.001
日期:2006.6
Kineticresolutions of (±)-3-chloro-3-arylpropanols by lipase mediated acetylation are described for the first time. Acetylation with CCL provided the best enantioselectivity amongst the enzymes used. Enantiomerically enriched products were obtained with up to 78% ee after two successive lipase-catalyzed acetylations. Different substituents on the aromatic ring and bromide, instead of chloride, on
Boron Trifluoride Mediated Prins Reaction of Methylene Diacetate with Styrenes. One-Pot Synthesis of 3-Chloro-3-arylpropanols
作者:Özdemir Dogan、Alper Isleyen
DOI:10.1055/s-2006-926445
日期:2006.5
give the expected 3-chloro-3-arylpropanols due to polymerization. Styrene with a strongly electron-withdrawing nitro substituent gave the corresponding 3-chloro-3-arylpropanol in very low yield. Under the same reaction conditions, substituted norbornene gave a tricyclic ether. A very easy procedure for the synthesis of methylene diacetate is also reported.