The first vanadium-catalyzed oxidation of aryl allylic selenides with in situ [2,3] sigmatropic rearrangement
作者:Rich G. Carter、T. Campbell Bourland
DOI:10.1039/b006278m
日期:——
The efficient synthesis of a series of 2° allylic alcohols from a vanadium-catalyzed oxidation of suitably disposed allylic selenides with tandem [2,3] sigmatropicrearrangement is outlined.
Set of Geldanamycin Derivatives and Their Preparation Methods
申请人:Li Zhuorong
公开号:US20100311694A1
公开(公告)日:2010-12-09
A set of geldanamycin derivatives and their preparation methods. Pharmaceutical compositions comprising the said compounds as an active ingredient which are used as antivirus and antitumor agents. The said derivatives are used in the manufacture of heat shock protein 90 (Hsp 90) inhibiting agents which have the utility as antivirus and antitumor agents.
Levene; Marker, Journal of Biological Chemistry, 1935, vol. 110, p. 299,303
作者:Levene、Marker
DOI:——
日期:——
Synthesis of Four Stereoisomers of (<i>S</i>)-2-Methylpent-3-yl 3,13-Dimethylpentadecanoate, a Sex Pheromone of the Bagworm Moth<i>Clania variegate</i>, Using Stereospecific Inversion of Secondary Sulfonates as a Key Step
Recently, we have established a simple preparative method for the synthesis of methyl-branched building blocks by utilizing an SN2reaction of chiral secondary tosylates derived from (S)- and (R)-propylene oxides. The usefulness of these building blocks was demonstrated by their application in the synthesis of all four stereoisomers of an acid moiety in the bagworm pheromone. The enantiomeric purities of
Asymmetric Hydrogenation of Allylic Alcohols Using Ir–N,P-Complexes
作者:Jia-Qi Li、Jianguo Liu、Suppachai Krajangsri、Napasawan Chumnanvej、Thishana Singh、Pher G. Andersson
DOI:10.1021/acscatal.6b02456
日期:2016.12.2
γ-disubstituted and β,γ-disubstituted allylicalcohols were prepared and successfully hydrogenated using suitable N,P-based Ir complexes. High yields and excellent enantioselectivities were obtained for most of the substrates studied. This investigation also revealed the effect of the acidity of the N,P–Ir-complexes on the acid-sensitive allylicalcohols. DFT ΔpKa calculations were used to explain the effect of