L -Alanine.hydrochloride

For extraction of the 170 CS tensor components, analysis of stationary NMR spectra is one of the most straightforward methods. Figure 8 shows the experimental and calculated 170 stationary NMR spectra of [170]-L-alanine hydrochloride observed and calculated at (A) 9.4, (B) 11.7 and (C) 21.6 T.54... 

Noordik JH, Jeffrey GA (1977) Acta Crystallogr, Sect B 33 403 ALAHCL. L-Alanine hydrochloride (C3H8N02, Cl-). Blasio B di, Pavone V, Pedone C (1977) Cryst Struct Commun 6 745... 

L(+)-alanine, mp 297C (decomposes). D(-)-alanine, mp 295C (decomposes). L(+)-alanine hydrochloride prisms, mp 204C (decomposes). 

In the radioactive tracer experiments H- or C-labeled D- or L-Alanine hydrochloride (Ala HCl) in DMF solutions were equilibrated with finely powdered d- or /-quartz Differences in rates of radioactive disintegrations of solutions before and after equilibration gave a measure of the amount of Ala HCl adsorbed on the quartz samples. In general, r/-quartz preferentially adsorbed D-Ala HCl and the /-quartz Z,-Ala HCl to the extents of 1-1.8%. These experiments used finely powdered samples of d- and /-quartz which had been prepared from known morphological handedness and optical rotation, but the authors failed to mention how the Brasilian twins (if any) were removed from quartz samples They did note that samples of quartz were prepared by hydrothermal growth and that crystals were checked... 

Adsorption of and C-labeled D- and L-alanine hydrochloride on d- and /-quartz crystals (modified data adapted from Bonner et al. 

Phosphonic acid amide esters. A soln. of ethyl [l-[[(phenylmethoxy)carbonyl]amino]-2-methylpropyl]phosphinate in acetonitrile under argon treated with bis(trimethyl-silyl)acetamide, followed after 1 min by L-alanine hydrochloride methyl ester, CCI4, and Et3N, the soln. stirred at room temp, for 30 min, cooled to 0°, and quenched with methanol N-[ethoxy[ 1 -[[(phenylmethoxy)carbonyl]am no]-2-methylpropyl]-... 

K. Yamada, T. Shimizu, T. Yamazaki, S. Ohkei, Determination of the orientations for the NMR tensors in a polycrystaHine L-alanine hydrochloride, Solid State Nucl. Magn. Reson. 33 (2008) 88. 

L-Cysteinyl-L cysteine monohydrate, 43B, 596 L-Cystine (hexagonal form), 23, 593 L-Cystine (tetragonal form), 40B, 439 imonium DL-7-carboxyglutamate, 45B, 512 L-Alanyl-L-alanine hydrochloride, 34B, 270 lloisoleucine, 41B, 531 Isoleucine, 39B, 352 Leucine, 41B, 530 Norleucine, 17, 659 isoleucune, 37B, 268 Leucine, 42B, 355 leucine, 39B, 349... 

An equimolar amount of N-hydroxysuccinimide palmitate and a slight excess of triethylamine added at room temp, to a stirred soln. of ethyl l-alaninate hydrochloride in chloroform, and the product isolated after 2 hrs. at room temp. ethyl N-palmitoyl-L-alaninate. Y 95%. 

Tryptophan peptides. Triethylamine added to a soln. of benzyl L-alaninate hydrochloride in methylene chloride, mixed at 0° with a soln. of carbobenzoxy-L-tryptophan in the same solvent, dicyclohexylcarbodiimide added, and stirred overnight at room temp. benzyl carbobenzoxy-L-tryptophanyl-L-alaninate. Y 80%. F.e. s. M. Wilchek and A. Patchornik, J. Org. Ghem. 28, 1874 (1963) glycopeptides in pyridine cf. S. M. Amir, J. S. Brimacombe, and M. Stacey, Nature 203, 401 (1964),... 

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