Application

No.116
Pyridine N-Oxide Derivative
P1406 4-Phenylpyridine N-Oxide (1) 25g
5g

4-Phenylpyridine N-oxide (1) is used as a co-catalyst in the enantioselective epoxidation of unfunctionalized olefins using chiral (salen)manganese(III) complexes as catalysts. For example, in the presence of 1 and Jacobsenユs catalyst, epoxyindan 2 is obtained in relatively high enantioselectivity by the oxidation of indene with sodium hypochlorite. Merck's HIV protease inhibitor Crixivan® is synthesized from epoxyindan 2 via chiral aminoindanol 3.1,2)

References

1) Synthesis of (1S,2R)-1-aminoindan-2-ol
J. F. Larrow, E. Roberts, T. R. Verhoeven, K. M. Ryan, C. H. Senanayake, P. J. Reider, E. N. Jacobsen, Org. Synth., 76, 46 (1999).
2) The design of a potent and orally bioavailable HIV protease
inhibitor

B. D. Dorsey, R. B. Levin, S. L. McDaniel, J. P. Vacca, J. P. Guare, P. L. Darke, J. A. Zugay, E. A. Emini, W. A. Schleif, J. C. Quintero, J. H. Lin, I.-W. Chen, M. K. Holloway, P. M. D. Fitzgerald, M. G. Axel, D. Ostovic, P. S. Anderson, J. R.
Huff, J. Med. Chem., 37, 3443 (1994).
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