Absolute Configuration of Secondary Alcohols by <sup>1</sup>H NMR: In Situ Complexation of α-Methoxyphenylacetic Acid Esters with Barium(II)
作者:Rosa García、José M. Seco、Saulo A. Vázquez、Emilio Quiñoá、Ricardo Riguera
DOI:10.1021/jo0256989
日期:2002.6.1
allows the assignment of the absolute configuration of chiral secondary alcohols by NMR using only one derivative is presented. All that is needed is (a) the derivatization of the alcohol of unknown configuration with one enantiomer--either the (R)- or the (S)--of alpha-methoxyphenylacetic acid (MPA), (b) the recording of the 1H NMR spectrum of the resulting ester in MeCN-d3, and (c) addition of a barium(II)
Upcycling a plastic cup: one-pot synthesis of lactate containing metal organic frameworks from polylactic acid
作者:Benjamin Slater、So-On Wong、Andrew Duckworth、Andrew J. P. White、Matthew R. Hill、Bradley P. Ladewig
DOI:10.1039/c9cc02861g
日期:——
Waste PLA can be upcycled to metal organic frameworks of potential high value in a one-pot synthesis scheme, where PLA depolymerisation occurs in situ. Three homochiral lactate based frameworks were successfully synthesised and characterised from PLA as a feed source, including ZnBLD. The chiral separation ability of ZnBLD was maintained.
A homochiral MOF membrane was successfully and facilely synthesized using an in situ growth method, which had the advantages of cheap raw materials, simple operation and high thermal stability. A diol isomer mixture was used to test the separation efficiency of the membrane at different temperatures and pressures.
NMR determination of the absolute configuration of chiral 1,2- and 1,3-diols
作者:Hiroki Fukui、Yukiharu Fukushi、Satoshi Tahara
DOI:10.1016/s0040-4039(03)00845-1
日期:2003.5
1,2- and 1,3-diols examined was derivatized exclusively to a single diastereomeric acetal by the use of a new axially chiral reagent, 2′-methoxy-1,1′-binaphthalene-8-carbaldehyde (MBC). The absoluteconfiguration of the original 1,2- and 1,3-diols was determined by the NOE correlation between the proton signals of the reagent moiety and those of the diol moiety in the acetals.