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Facile Entry to an Efficient and Practical Enantioselective Synthesis of a Polycyclic Cholesteryl Ester Transfer Protein Inhibitor
journal contribution
posted on 2014-08-15, 00:00 authored by Zhengxu S. Han, Yibo Xu, Daniel R. Fandrick, Sonia Rodriguez, Zhibin Li, Bo Qu, Nina C. Gonnella, Sanjit Sanyal, Jonathan
T. Reeves, Shengli Ma, Nelu Grinberg, Nizar Haddad, Dhileep Krishnamurthy, Jinhua J. Song, Nathan K. Yee, Waldemar Pfrengle, Markus Ostermeier, Jürgen Schnaubelt, Zeno Leuter, Sonja Steigmiller, Jürgen Däubler, Emanuel Stehle, Lukas Neumann, Thomas Trieselmann, Patrick Tielmann, Annette Buba, Rainer Hamm, Gunter Koch, Svenja Renner, Juan
R. Dehli, Florian Schmelcher, Christian Stange, Jürgen Mack, Rainer Soyka, Chris
H. SenanayakeAn efficient enantioselective synthesis
of the chiral polycyclic
cholesteryl ester transfer protein (CETP) inhibitor 1 has been developed. The synthesis was rendered practical for large
scale via the development of a modified Hantzsch-type reaction to
prepare the sterically hindered pyridine ring, enantioselective hydrogenation
of hindered ketone 6 utilizing novel BIBOP-amino-pyridine
derived Ru complex, efficient ICl promoted lactone formation, and
a BF3 mediated hydrogenation process for diastereoselective
lactol reduction. This efficient route was successfully scaled to
produce multikilogram quantities of challenging CETP drug candidate 1.
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Practical Enantioselective SynthesisEfficientFacile Entryenantioselective hydrogenationcandidatestericallydiastereoselective lactol reductionenantioselective synthesis1.CETPquantityketone 6multikilogram quantitiesBF 3inhibitor 1Polycyclic Cholesteryl Ester Transfer Protein InhibitorAnhydrogenation processICllactone formationchiral polycyclic cholesteryl ester transfer proteinRupyridine ring
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