A stereospecific synthesis of (R,R)-phytol uith highly stereochemioal purity in both absolute and geometrical aonfigurations uas achieved by utilizing the SNZ type ring-opening reaction of (R)-β-methyl-β-propiolactone, and the SNZ′ type ring-opening reaction of isopropenyl oxirane, from (R)-pulegone as a starting material.
利用(R)-β-甲基-β-丙内酯的S N Z型开环反应实现的(R,R)-植物甾醇的立体定向合成,无论是绝对构型还是几何构型都具有高度立体化学纯度。异丙烯基环氧乙烷的N Z'型开环反应,以(R)-普来高酮为原料。
A SIMPLE STEREOSELECTIVE SYNTHESIS OF (l<i>R</i>,3<i>R</i>,5<i>S</i>)-1,3-DIMETHYL-2,9-DIOXABICYCLO[3,3,1]NONANE USING REGIOSELECTIVE RING-OPENING OF (<i>R</i>)-β-METHYL-β-PROPIOLACTONE
A facile stereoselective synthesis of (1R,3R,5S)-1,3-dimethyl-2,9-dioxabicyclo[3.3.1]nonane was achieved from (R)-2-hydroxy-7-octen-4-one, which was easily prepared by the copper-catalyzed reaction of (R)-β-methyl-β-propiolactone with vinylmagnesium bromide.
The synthesis of diverse N-substituted GMDPs from an orthogonally protected disaccharide is described. The effects of both N-substituted moieties of GMDPs on the immunostimulatory activity of hNOD2 were systematically investigated.