Concomitant crystallization: diaminobenzenesulfonic acids

Effects of amino acids on malarial heme crystallization.

To gain insight into the mechanism of malarial hemozoin formation and to explore various biological groups for screening novel antimalarial drugs, we examined the effects of amino acids on the formation of beta-hematin (BH), which is a synthetic heme crystal structurally identical to hemozoin, in vitro. Our results showed that BH formation was significantly inhibited by basic amino acids (argin...

Effect of Amino Acids on Magnesium Ammonium Phosphate Hexahydrate (Struvite) Crystallization

On the concomitant crystallization of amino acid crystals upon dissolution of some amino acid salt crystals†

The concomitant crystallization of two polymorphs of 1-deoxy-alpha-D-tagatose.

The crystalline form of 1-deoxy-D-tagatose, C6H12O5, is shown to be 1-deoxy-alpha-D-tagatopyranose; the absolute configuration is determined by use of D-lyxono-1,4-lactone as the starting material. The title compound crystallized as concomitant polymorphs from a mixture of ethyl actate and methanol. Although the melting points of the materials differ by 7 K, the molecular conformations are almo...

A Crystallization-Induced Asymmetric Transformation using Racemic Phenyl Alanine Methyl Ester Derivatives as Versatile Precursors to Prepare Amino Acids

L-Tyrosine and L-Dopa are the precursors in the biological synthesis of amine neurotransmitters. On the other hand, phenylalanine as an aromatic amino acid (AAA) is a precursor in the synthesis of L-Tyrosine and L-Dopa. For some substrates such as amino acids, resolution by the formation of diastereomers offers an attractive alternative. Among different methods in this case, crystallization-ind...