Synthesis and Cellular Profiling of Diverse Organosilicon Small Molecules
作者:Annaliese K. Franz、Philip D. Dreyfuss、Stuart L. Schreiber
DOI:10.1021/ja067552n
日期:2007.2.1
Small-molecule synthesis coupled with cellular profiling using multidimensional screening can be used to assess the impact of varying stereochemical and appendage contexts on biological activity. In this communication, we describe the synthesis and cellular profiling of chiral organosilicon smallmolecules derived from a crotylsilane annulation pathway. We considered that incorporating a main-group
Catalytic Asymmetric Synthesis of Substituted 3-Hydroxy-2-Oxindoles
作者:Nadine V. Hanhan、Aziza H. Sahin、Toby W. Chang、James C. Fettinger、Annaliese K. Franz
DOI:10.1002/anie.200904393
日期:2010.1.18
used to catalyze the addition of indoles and other π nucleophiles to N‐alkylated and unprotected isatins (see picture). The resulting biologically relevant substituted3‐hydroxy‐2‐oxindoles were obtained in high yield with high enantioselectivity. Tf=trifluoromethanesulfonyl.
A radical cyclization of N‐methyl‐N‐arylpropiolamide to isatins via an oxidative cleavage of a carbon‐carbon triple bond has been developed. In the presence of oxone and NaNO2, a variety of N‐methyl‐N‐arylpropiolamides were smoothly transformed into isatins. A nitration reaction proceeded along with the oxidative cyclization; both nitrated and non‐nitrated isatins were obtained in a one‐pot reaction