Total Syntheses of (±)-Rhodonoids A and B and C12-<i>epi</i>-Rhodonoid B
作者:Hao Wu、Richard P. Hsung、Yu Tang
DOI:10.1021/acs.joc.6b02739
日期:2017.2.3
Totalsyntheses of (±)-rhodonoids A and B and C12-epi-rhodonoid B are described here. A unified strategy employed in these syntheses is an intramolecular oxa-[3 + 3] annulation for accessing the chromene unit. A Fe(OTf)3-promoted diastereoselective cationic [2 + 2] cycloaddition and a photochemical [2 + 2] cycloaddition were featured to construct the cyclobutane core of (±)-rhodonoids A and B and C12-epi-rhodonoid
[EN] PRODUCTION OF FARNESOL<br/>[FR] PRODUCTION DE FARNÉSOL
申请人:DSM IP ASSETS BV
公开号:WO2017046346A1
公开(公告)日:2017-03-23
The present invention relates to an improved way for the production of farnesol.
本发明涉及一种改进的法方法生产法尼醇。
Probe Compound for Detecting and Isolating Enzymes and Means and Methods Using the Same
申请人:Golyshin Peter N.
公开号:US20120231972A1
公开(公告)日:2012-09-13
The present invention relates to a probe compound that can comprise any substrate or metabolite of an enzymatic reaction in addition to an indicator component, such as, for example, a fluorescence dye, or the like. Moreover, the present invention relates to means for detecting enzymes in form of an array, which comprises any number of probe compounds of the invention which each comprise a different metabolite of interconnected metabolites representing the central pathways in all forms of life. Moreover, the present invention relates to a method for detecting enzymes involving the application of cell extracts or the like to the array of the invention which leads to reproducible enzymatic reactions with the substrates. These specific enzymatic reactions trigger the indicator (e.g. a fluorescence signal) and bind the enzymes to the respective cognate substrates. Moreover, the invention relates to means for isolating enzymes in form of nanoparticles coated with the probe compound of the invention. The immobilisation of the cognate substrates or metabolites on the surface of nanoparticles by means of the probe compounds allows capturing and isolating the respective enzyme, e.g. for subsequent sequencing.
Asymmetric cyclization of unsaturated aldehydes catalyzed by a chiral lewis acid
作者:Soichi Sakane、Keiji Maruoka、Hisashi Yamamoto
DOI:10.1016/s0040-4020(01)90599-x
日期:1986.1
A highly enantioselective cyclization of unsaturated aldehydes has been accomplished with the chiral zinc reagent derivd from dimethylzinc and (R)-(+)-1,1'-bi-2-naphthol. Thus, the Aldehyde and are treated with the reagent , producing the trans alcohol and respectively, with high optical purity (90% ee). In sharp contrast, the aldehyde affords the totally racemic alcohol . Since the chiral zinc reagent