Advances in Crystallization Processes by Y. Mastai

By Y. Mastai

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J. Chem. Soc. Perkin Trans 2, 1994, 1883 b). : J. Therm. Anal. 1997, 48, 691. : Tetrahedron Lett. 1980, 21, 647. [19] Pasteur, L. Acad. , 1848, 26, 535. : Termal. Anal. 1988, 33, 1241. : J. Chem. Soc. Perkin Trans 2, 2000, 149. : Tetrahedron: Asymm. 2000, 11, 809. ; Simon, H;. : Chirality 2001, 13, 29. : PhD disz. 2003 [25] a). ; Fogassy, E. b). Hung. Pat. no. ; Böcskei, Zs. Chirality, 1994, 6, 314 [27] Kassai, Cs: PhD diss. : Tetrahedron Letters, 1994, 35, 257260 . :. Tetrahedron: Asymmetry.

We will begin with a short introduction on crystallization on SAMs. Then, we will review the latest advances in crystallization on patterned SAM's and effects of SAMs on crystal morphology and crystal polymorphism. This chapter will also include a description of chiral SAMs and their role in enantioselective crystallization. 2. Crystallization on SAMs Crystallization refers to the formation of solid crystals from a solution, melt or more rarely, directly from gas. Crystallization consists of two processes – nucleation and crystal growth.

That time the resolving agent remained in the filtrate crystallized with (R)-CPA enantiomer as diastereoisomeric salt and in the second mother liquor an almost racemic CPA-Na salt was found (it can be recycled into the resolution). Cl Cl OH N. 27 (S)-CPA-(S)-BAB OH N. 43 27 Separation of the Mixtures of Chiral Compounds by Crystallization The behaviour of racemic compounds may also be influenced with the choice of pH value of the aqueous solution. 0). The free racemic aminoacid with (S)-camphorsulfonic acid (CSA) forms a well crystallizing salt in water, but the amino acid in the precipitated diastereoisomer have almost racemic composition.

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