Mechanochemical Racemization of L-Leucine

N-Methyl-l-leucyl-l-leucine hydro­chloride monohydrate

In the title compound C(13)H(27)N(2)O(3) (+)·Cl(-)·H(2)O, obtained by deprotecting the amino and carboxyl groups of an inter-mediate in the synthesis of the cyclic penta-peptide Galaxamide, a number of hydrogen-bonding inter-actions occur including aminium N-H⋯Cl, amide-carboxyl N-H⋯O, water O-H⋯Cl and carbox-yl-water O-H⋯O associations. The aminium N-H⋯Cl⋯H-N bridging extensions give rise to z...

L-Leucine alleviates Diamond-Blackfan anemia.

D iamond-Blackfan anemia (DBA) is a rare genetic disease resulting from sporadic mutations and occasional autosomal-dominant inheritance. Almost uniformly, patients manifest in the newborn period with a macrocytic anemia, occasional multilineage cytopenias, variable developmental abnormalities, and a propensity for cancer.3,4 Underlying mutations in 9 genes encoding ribosomal proteins (RPs) hav...

N-(Fluoren-9-ylmethoxy­carbon­yl)-l-leucine

THE TITLE COMPOUND [SYSTEMATIC NAME: fluoren-9-yl N-(1-carb-oxy-3-methyl-butyl)carbamate], C(21)H(23)NO(4), exhibits torsion angles that vary from the typical values found in other Fmoc-protected amino acids, viz. the orientations of the fluorene and carboxyl groups [C-O-C-C = 93.8 (2) and N-C-C=O = -23.6 (2)°]. The crystal structure exhibits two inter-molecular hydrogen bonds (O-H⋯O and N-H⋯O)...

Mechanochemical synthesis of alumina nanoparticles

Abstract: Nano- size alumina particles have been synthesized by mechanical activation of a dry powder mixture of AlCl3 and CaO. Mechanical milling of the above raw materials with the conditions adopted in this study resulted in the formation of a mixture consisting of crystalline CaO and amorphous aluminum chlorides phases. There was no sign of chemical reaction occurring during milling stag...

Amino Acid Racemization