Synthesis of All Four Stereoisomers of 3-Amino-2-hydroxybutanoic Acids
作者:Jin Hwan LEE、Min Suk YANG、Kuy Young KANG、Yea Hwang MOON、Ki Hun PARK
DOI:10.1271/bbb.68.714
日期:2004.1
All fourstereoisomers of 3-amino-2-hydroxybutanoic acids were been obtained as single enantiomers via stereospecific reactions from D-gulonic acid gamma-lactone and D-glucono-delta-lactone.
Improved Stereoselectivity in Intramolecular S<sub>N</sub>2′ Cyclization through Use of Mechanistic Principles
作者:Ki Park、Woo Seo、Marcus Curtis-Long、Seong Jeong、Tae Jun、Min Yang
DOI:10.1055/s-2006-958956
日期:2007.1
Valine and alanine were converted into the corresponding α-hydroxy-β-amino acids through intramolecular S N 2' cyclization. The novel cyclization protocol relied upon the use of N-benzyl-protected carbamates derived from α-amino acids.
Stereocontrolled Asymmetric Synthesis of α-Hydroxy-β-amino Acids. A Stereodivergent Approach
作者:Yutaka Aoyagi、Rajendra P. Jain、Robert M. Williams
DOI:10.1021/ja0042332
日期:2001.4.1
The stereocontrolled asymmetric synthesis of alpha-hydroxy-beta-amino acids has been investigated via the Lewis acid-promoted cyanation of (5R,6S)-2-acetoxy-4-(benzyloxycarbonyl)-5,6-diphenyl-2,3,5,6-tetrahydro-4H-1,4-oxazines with trimethylsilyl cyanide. Base-catalyzed hydrolysis of the resulting cyano compounds proceeds with excellent stereoselectivity, providing access to diastereomerically pure
Stereoselective cyanation of chiral α-amino aldehydes by reaction with Nagata's reagent: a route to enantiopure β-amino-α-hydroxy acids
作者:José M. Andrés、Marı́a A. Martı́nez、Rafael Pedrosa、Alfonso Pérez-Encabo
DOI:10.1016/s0957-4166(01)00044-1
日期:2001.2
Chiral alpha -dibenzylamino aldehydes react with diethylaluminum cyanide leading to anti-beta -dibenzylamino-alpha -hydroxy-cyanides as the major diastereoisomers in good yields and diastereomeric excesses. Hydrolysis of the nitrile derivatives allows the synthesis of enantiopure beta -amino-alpha -hydroxy acids. (C) 2001 Elsevier Science Ltd. All rights reserved.