ORGN 737 |
During the course of a recent drug discovery program, we required an efficient synthesis of 2-benzyloxy pyridine derivatives. The initial route relied on an alkylation of a 2-hydroxy pyridine intermediate, which proceeded in good overall yield but gave a mixture of products resulting from O- and N-alkylation. To avoid the need for separation of regioisomers, an alternative strategy was examined that involved nucleophilic addition to various 2-fluoropyridine derivatives. We found that additions of a variety of primary and secondary alcohols proceed in excellent yield under mild conditions (KOt-Bu, THF, 50 ˚C, 2-6 h) even when strongly electron donating groups are present on the 2-fluoropyridyl template. This approach would be well suited for rapid expansion of chemical space using parallel medicinal chemistry. |
Heterocycles and Aromatics, Asymmetric Reactions and Syntheses and Total Synthesis of Complex Molecules
7:00 PM-9:00 PM, Wednesday, August 19, 2009 Walter E. Washington Convention Center -- Ballroom C, Poster
Division of Organic Chemistry |