A new polymer-supported reagent--poly{[4-hydroxy(tosyloxy)iodo]styrene} has good reactivity in the formation of 2-amino-4-arylthiazoles, and the procedure of regeneration and cycle are also described.
The linear hexapeptide(His-Gly-Asp) was synthesized on solid support.FM group was used for a carboxyl protection group at Aspl.Peptide was cyclizsed by BOP reagent while still attached to the solid support.BOP proceed...The linear hexapeptide(His-Gly-Asp) was synthesized on solid support.FM group was used for a carboxyl protection group at Aspl.Peptide was cyclizsed by BOP reagent while still attached to the solid support.BOP proceeded more rapidly and gave purer product than DCC/HOBt method.展开更多
A mild,efficient and regioselective method for the mononitration of phenolic compounds is described using bismuth subnitrate/ charcoal in the presence of trichloroisocyanuric acid in CH2Cl2 at room temperature.
Hydrogen peroxide was supported on polyvinylpyrrolidone to afford a stable and mild oxidizing reagent. Activated aromatic compounds were reacted with PVP-H2O2 in the presence of KI or I2 and a catalytic amount of H3PW...Hydrogen peroxide was supported on polyvinylpyrrolidone to afford a stable and mild oxidizing reagent. Activated aromatic compounds were reacted with PVP-H2O2 in the presence of KI or I2 and a catalytic amount of H3PW12O40 in refluxing CH2Cl2 to afford the corresponding iodinated arenes.展开更多
文摘A new polymer-supported reagent--poly{[4-hydroxy(tosyloxy)iodo]styrene} has good reactivity in the formation of 2-amino-4-arylthiazoles, and the procedure of regeneration and cycle are also described.
文摘The linear hexapeptide(His-Gly-Asp) was synthesized on solid support.FM group was used for a carboxyl protection group at Aspl.Peptide was cyclizsed by BOP reagent while still attached to the solid support.BOP proceeded more rapidly and gave purer product than DCC/HOBt method.
基金Financial support by DUBS Research Council is gratefully acknowledged
文摘A mild,efficient and regioselective method for the mononitration of phenolic compounds is described using bismuth subnitrate/ charcoal in the presence of trichloroisocyanuric acid in CH2Cl2 at room temperature.
文摘Hydrogen peroxide was supported on polyvinylpyrrolidone to afford a stable and mild oxidizing reagent. Activated aromatic compounds were reacted with PVP-H2O2 in the presence of KI or I2 and a catalytic amount of H3PW12O40 in refluxing CH2Cl2 to afford the corresponding iodinated arenes.
