Microwave Thermolysis V: A Rapid and Selective Method for the Cleavage of THP Ethers, Acetals and Acetonides Using Clay Supported Ammonium Nitrate “Clayan” in Dry Media
摘要:
The deprotection of a variety of tetrahydropyranyI ethers (THP), acetonides and acetals into their parent compounds using clay supported ammonium nitrate "Clayan" under microwave irradiation is described. The eco-friendly nature of the reagent and non solvent conditions are the important features of the procedure.
these challenges rationally in the case of the enzymatic synthesis of methyl 3‐hydroxy‐2‐methylpropanoate (commonly denoted as the Roche ester) and derivatives thereof using the ene reductase YqjM. By a highly efficient, concept‐based approach of designing mutant variants of YqjM and engineering substrates we could alter both the rate constant and the enantioselectivity of the reaction. Preparative scale
Microwave Thermolysis V: A Rapid and Selective Method for the Cleavage of THP Ethers, Acetals and Acetonides Using Clay Supported Ammonium Nitrate “Clayan” in Dry Media
作者:H. M. Meshram、G. Sumithra、G. S. Reddy、Y. S. S. Ganesh、J. S. Yadav
DOI:10.1080/00397919908086448
日期:1999.8
The deprotection of a variety of tetrahydropyranyI ethers (THP), acetonides and acetals into their parent compounds using clay supported ammonium nitrate "Clayan" under microwave irradiation is described. The eco-friendly nature of the reagent and non solvent conditions are the important features of the procedure.
Synthesis of an immunomodulator (+)-conagenin and its analogs
Stereoselective synthesis of an immunomodulator (+)-conagenin was achieved. Both amine and carboxylic acid moieties were prepared from commercially available optically active methyl 3-hydroxy-2-methylpropanoate using dirhodium(II)-catalyzed C–H amination and chelation-controlled reductions as key steps. In addition, demethyl analogs of conagenin were synthesized using similar procedures.