helix induction and subsequent static helicity memory in a poly(biphenylylacetylene) were achieved using a catalytic amount of nonracemic ammonium salts with non-coordinating tetrakis[3,5-bis(trifluoromethyl)phenyl]borate as a counter anion. Helix induction relies on crown-ether-like specific intermolecular complex formation of the two methoxymethoxy groups of the biphenyl pendants with chiral ammonium
Application of Chiral Transfer Reagents to Improve Stereoselectivity and Yields in the Synthesis of the Antituberculosis Drug Bedaquiline
作者:Juliana M. S. Robey、Sanjay Maity、Sarah L. Aleshire、Angshuman Ghosh、Ajay K. Yadaw、Subho Roy、Sarah Jane Mear、Timothy F. Jamison、Gopal Sirasani、Chris H. Senanayake、Rodger W. Stringham、B. Frank Gupton、Kai O. Donsbach、Ryan C. Nelson、Charles S. Shanahan