Improved Method for the Diimide Reduction of Multiple Bonds on Solid-Supported Substrates
作者:Keith R. Buszek、Neil Brown
DOI:10.1021/jo0622173
日期:2007.4.1
A mild and improved method for reducing multiple bonds on various resins with diimide is described. The simple procedure readily generates diimide from 2-nitrobenzenesulfonohydrazide and triethylamine at room temperature. A number of representative multiple bonds in various steric and electronic environments were examined, including polar double bonds such as carbonyl and azo, for ease and selectivity of reduction. A general trend of reactivity was identified which revealed, inter alia, that terminal olefins, 1,2-disubstituted olefins, electron-poor olefins, and terminal alkynes were the most easily reduced.
Probing the structural requirements for vitamin D3 inhibition of the hedgehog signaling pathway
作者:Albert M. DeBerardinis、Upasana Banerjee、Michele Miller、Steven Lemieux、M.K. Hadden
DOI:10.1016/j.bmcl.2012.05.037
日期:2012.7
A structure–activityrelationshipstudy to elucidate the structural basis for hedgehog (Hh) signaling inhibition by vitaminD3 (VD3) was performed. Functional and non-functional regions of VD3 and VD2 were obtained through straightforward synthetic means and their biological activity was determined in a variety of cell-based assays. Several of these compounds inhibited Hh signaling at levels comparable