What is the characteristic structural difference of a hemiacetal?

1 ANSWERS

1. Ali Abdullah
   

   Hi, Department of Bioorganic Chemistry, Institute of Chemistry at Tallinn Technical University, Akadeemia tee 15, 12 618 Tallinn, Estonia bDepartment of Chemical Physics, National Institute of Chemical Physics and Biophysics, Akadeemia tee 23, 12 618 Tallinn, Estonia Received 10 January 2002; revised 25 February 2002; accepted 7 March 2002. Available online 20 March 2002. Abstract Lipase-catalyzed decyclization of hemiacetals of α-bromo-ω-hydroxyaldehydes followed by trapping upon acetylation was observed. Quantum chemical investigations were performed to explain the energetic background of the reactions. The stereocontrolled synthesis of enantiopure trans-(2S,3S)-2-methoxy-tetrahydropyran-3-ol was elaborated. Graphic

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