Pyridopyrimidine protein tyrosine phosphatase inhibitors
申请人:Berthel Joseph Steven
公开号:US20070021445A1
公开(公告)日:2007-01-25
The present invention comprises pyridopyrimidinediamine compounds of the general formula I:
The compounds of the present invention are potent inhibitors of PTP1B. Accordingly, the invention also encompasses pharmaceutical compositions and methods of treating or preventing PTP-1B mediated diseases, including diabetes, obesity, and diabetes-related diseases.
Three-step synthesis of an array of substituted benzofurans using polymer-supported reagents
作者:Jörg Habermann、Steven V. Ley、René Smits
DOI:10.1039/a904384e
日期:——
achieved by the bromination of acetophenones to α-bromoacetophenones by polymer-supported pyridiniumbromideperbromide (PSPBP). The subsequent clean substitution of the obtained bromides by phenols using 1,5,7-triazabicyclo[4.4.0]dec-5-ene (TBD-P) and cyclodehydration of the resulting α-phenoxyacetophenones using Amberlyst 15, affords pure products without the need for any chromatographic purification
Methyl-substituted-2-nitro-3-phenylbenzofurans are prepared from methyl-substituted-3-phenylbenzofurans and are found to be useful antimicrobial agents.
Synthesis of benzofurans from the cyclodehydration of α-phenoxy ketones mediated by Eaton’s reagent
作者:Zhanwei Ma、Min Zhou、Lin Ma、Min Zhang
DOI:10.1177/1747519820907244
日期:2020.7
acid) is used to prepare 3-substituted or 2,3-disubstituted benzofurans with moderate to excellent yields under mild conditions. The method provides a facile access to benzofurans from readily available starting materials such as phenols and α-bromo ketones. The reaction is highly efficient, which is attributed to the good reactivity and fluidity of Eaton’s reagent. The reaction can be applied to prepare
A Practical and Efficient Route for the Highly Enantioselective Synthesis of Mexiletine Analogues and Novel β-Thiophenoxy and Pyridyl Ethers
作者:Kun Huang、Margarita Ortiz-Marciales、Viatcheslav Stepanenko、Melvin De Jesús、Wildeliz Correa
DOI:10.1021/jo801181d
日期:2008.9.1
A practical and efficient procedure for the enantioselective synthesis of mexiletine analogues with use of 10% of spiroborate ester 6 as chirality transfer agent is presented. A variety of mexiletine analogues were prepared in good yield with excellent enantioselectivities (91−97% ee) from readily available starting materials. The developed methodology was also successfully applied for the synthesis