Iridium-Catalyzed Asymmetric Hydrogenation of Vinyl Ethers
作者:Ye Zhu、Kevin Burgess
DOI:10.1002/adsc.200700546
日期:2008.5.5
A carbene-oxazoline catalyst 1 proved to be an effective catalyst for reduction of an enol ether that the literature suggested could not be hydrogenated effectively by P,N-Ir catalysts. Thus, a series of ester and alcohol substrates were hydrogenated using catalyst 1. Good to excellent enantioselectivities and high conversions were obtained.
Levene; Marker, Journal of Biological Chemistry, 1933, vol. 102, p. 299
作者:Levene、Marker
DOI:——
日期:——
Conformational Analysis of Oligomers of (<i>R</i>)-3-Hydroxybutanoic Acid in Solutions by<sup>1</sup>H NMR Spectroscopy
作者:Jun Li、Jun Uzawa、Yoshiharu Doi
DOI:10.1246/bcsj.71.1683
日期:1998.7
(R)-3-hydroxybutanoic acid (3-HB) with different end groups and chain lengths have been prepared as model compounds of bacterial poly[(R)-3-hydroxybutanoate] [P(3-HB)]. They were studied in terms of their conformational behavior generated by rotation about CH2–CH bond of 3-HB units in solutions. The conformational behaviors of 3-HB oligomers were investigated in various solvents by analysis of vicinal coupling