Natural Product-like Combinatorial Libraries Based on Privileged Structures. 1. General Principles and Solid-Phase Synthesis of Benzopyrans
作者:K. C. Nicolaou、J. A. Pfefferkorn、A. J. Roecker、G.-Q. Cao、S. Barluenga、H. J. Mitchell
DOI:10.1021/ja002033k
日期:2000.10.1
report a novel strategy for the design and construction of natural and natural product-like librariesbased on the principle of privileged structures, a term originally introduced to describe structural motifs capable of interacting with a variety of unrelated molecular targets. The identification of such privileged structures in naturalproducts is discussed, and subsequently the 2,2-dimethylbenzopyran
Studies of Substituent Effect on Asymmetric Epoxidation of Chromenes by Chiral Dioxirane
作者:O. Andrea Wong、Yian Shi
DOI:10.1021/jo0604179
日期:2006.5.1
A series of 6- and 8-substituted chromenes has been investigated for asymmetric epoxidation using chiral ketone catalysts. Up to 93% ee was achieved. Higher ee's are obtained when substrates are substituted at the 6- position. The enhanced enantioselectivity is likely due to the beneficial interaction between the 6-substituent of the substrate and the N-aryl or alkyl group of the ketone catalyst.
EVANS, J. M.;FAKE, C. S.;HAMILTON, T. C.;POYSER, R. H.;WATTS, E. A., J. MED. CHEM., 1983, 26, N 11, 1582-1589
作者:EVANS, J. M.、FAKE, C. S.、HAMILTON, T. C.、POYSER, R. H.、WATTS, E. A.