Synthesis of potassium 2,3,4-trihydroxy-2-methylbutanoate: a leaf-closing substance of Leucaena leucocephalam
作者:Sanjib Gogoi、Narshinha P. Argade
DOI:10.1016/j.tet.2004.07.081
日期:2004.10
diesterification, OsO4-dihydroxylation, acetonide protection, regioselective mono hydrolysis of unhindered ester moiety, borane–dimethylsulfide induced chemoselective reduction of carboxylic group and hydrolysis pathway. Surprisingly, the sodiumborohydridereduction of monoester 5 and lithium borohydridereduction of 11 furnished the undesired regioisomer 7.