cas 16720-61-9, D-Tyrosine, N-acetyl-, ethyl ester

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Resolution of N-protected amino acid esters using whole cells of Candida parapsilosis ATCC 7330
Whole cells of Candida parapsilosis ATCC 7330 were used for the resolution of N-acetyl amino acid esters. Excellent enantioselectivities (E = 40 to >500) were achieved for the resolution of N-protected protein and non-protein amino acid esters giving good yields (28-50%) and high enantiomeric excesses (up to >99%) for both enantiomers.
Stella, Selvaraj,Chadha, Anju
experimental part
p. 457 - 460
(2010/06/21)

Induced stereoselectivity and substrate selectivity of bio-imprinted α-chymotrypsin in anhydrous organic media
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St?hl, Marianne,Jeppsson-Wistrand, Ulla,M?nsson, Mats-Olle,Mosbach, Klaus
p. 9366 - 9368
(2007/10/02)

OPTIMIZATION OF THE ENZYMATIC SYNTHESIS OF AMINO ACID ESTERS. REACTION IN POLYPHASIC MEDIUM
N-acetyl-L-Tyrosine Ethyl Esters (ATEE) was synthesized from N-acetyl-L-Tyrosine and ethanol, with immobilized chymotrypsin as catalyst.For this purpose, a biphasic liquid reaction mixture consisting of an organic chloroform phase and aqueous phase was used.This system allows the shift of the reaction equilibrium towards ATEE synthesis by achieving continuous ATEE extraction in the organic phase.Synthesis rates of up to 90percent were obtained by optimizing the reaction conditions and controlling the pH of aqueous phase.
Vidaluc, J. L.,Baboulene, M.,Speziale, V.,Lattes, A.,Monsan, P.
p. 269 - 274
(2007/10/02)