4.2.1.9 | 2,3-dihydroxy-3-methylbutanoate = 3-methyl-2-oxobutanoate + H2O |
stereochemistry, elimination and protonation steps are stereospecific, enol-keto conversion takes place with proton addition at C-3 to the same face of the enol as that of the departing hydroxy-group |
33970 |