Threonine aldolases—an emerging tool for organic synthesis
摘要:
In a systematic study, 21 ring-substituted benzaldehydes were reacted with glycine under catalysis with a L-threonine aldolase (LTA) from Pseudomonas putida and a D-threonine aldolase (DTA) from Alcaligenes xylosoxidans to form the corresponding beta-hydroxy-alpha-amino acids 1-18. DTA proved to be highly selective with ee's > 99% (D) and de's up to 99% (syn). Two thiamphenicol precursors were synthesized utilizing DTA on a preparative scale. LTA-catalyzed reactions led to ee's > 99% (L) but low to moderate de's (20-50%, syn). (c) 2006 Elsevier Ltd. All rights reserved.
Threonine aldolases—an emerging tool for organic synthesis
作者:Johannes Steinreiber、Kateryna Fesko、Christoph Reisinger、Martin Schürmann、Friso van Assema、Michael Wolberg、Daniel Mink、Herfried Griengl
DOI:10.1016/j.tet.2006.11.035
日期:2007.1
In a systematic study, 21 ring-substituted benzaldehydes were reacted with glycine under catalysis with a L-threonine aldolase (LTA) from Pseudomonas putida and a D-threonine aldolase (DTA) from Alcaligenes xylosoxidans to form the corresponding beta-hydroxy-alpha-amino acids 1-18. DTA proved to be highly selective with ee's > 99% (D) and de's up to 99% (syn). Two thiamphenicol precursors were synthesized utilizing DTA on a preparative scale. LTA-catalyzed reactions led to ee's > 99% (L) but low to moderate de's (20-50%, syn). (c) 2006 Elsevier Ltd. All rights reserved.