Electric Literature of 19132-06-0, As an important bridge between the micro and macro material world, chemistry is one of the main methods and means for humans to understand and transform the material world.Mentioned the application of 19132-06-0,(2S,3S)-Butane-2,3-diol.
Enantiomeric recognition of amino acid salts by macrocyclic crown ethers derived from enantiomerically pure 1,8,9,16-tetrahydroxytetraphenylenes
Asymmetric synthesis of (R,R)- and (S,S)-1,8,9,16- tetrahydroxytetraphenylenes was achieved from starting material (2R,3R)-butane-2,3-diol and (2S,3S)-butane-2,3-diol respectively by utilizing a center-to-axis strategy. A series of crown ether compounds 20, 24, and 25 and their corresponding enantiomers derived from chiral tetrahydroxytetraphenylene were synthesized in enantiomerically pure forms. Enantiomeric recognition properties of these hosts toward l- and d-amino acid methyl ester hydrochloride were studied by the UV spectroscopy titration. The tetramer hosts (S,S,S,S,S,S,S,S)-20 and (R,R,R,R,R,R,R,R)-20 exhibited the best enantioselectivities toward l- and d-alanine methyl ester hydrochloride salt with KL/KD = 4.1 and KD/KL = 3.9, respectively. The new chiral macrocyclic hosts would further enrich the host-guest chemistry.
Balanced chemical reaction does not necessarily reveal either the individual elementary reactions by which a reaction occurs or its rate law.Electric Literature of 19132-06-0. In my other articles, you can also check out more blogs about 19132-06-0
Reference£º
Synthesis and Crystal Structure of a Chiral?C3-Symmetric Oxygen Tripodal Ligand and Its Applications to Asymmetric Catalysis,
Chiral lanthanide(III) complexes of sulphur¨Cnitrogen¨Coxygen ligand derived from aminothiourea and sodium?D-camphor-¦Â-sulfonate