Asymmetric synthesis of ?-(heteroaryl)alkylamines and ?-amino acids via nucleophilic 1,2-addition of lithiated heterocycles to aldehyde SAMP-hydrazones
Circular dichroic method for the determination of absolute configuration of α-furfuryl amines
作者:Wei-Shan Zhou、Xue-You Zhu、Jie-Fei Cheng
DOI:10.1016/s0957-4166(00)80351-1
日期:1993.7
An unambiguous assignment of absoluteconfiguration of α-furfuryl amines by using the circulardichroic method is described.
描述了通过使用圆二色性方法对α-糠胺的绝对构型的明确分配。
Synthesis of (S)- and (R)-1-(2-Furyl)alkylamines and (S)- and (R)-α-Amino Acids Through the Addition of Organometallic Reagents to Imines Derived from (S)-Valinol
Novel Enantioselective Synthesis of Both Enantiomers of Furan-2-yl Amines and Amino Acids
作者:Ayhan S. Demir、Özge Sesenoglu、Dinçer Ülkü、Cengiz Arıcı
DOI:10.1002/hlca.200390022
日期:2003.1
A new enantioselectivesynthesis of furan-2-ylamines and aminoacids is described, in which the key step is the oxazaborolidine-catalyzed enantioselective reduction of O-benzyl (E)- and (Z)-furan-2-yl ketone oximes to the corresponding chiral amines. The chirality of the furan-2-ylamines is fully controlled by the appropriate choice of the geometrical isomer of the O-benzyl oxime. Oxidation of the
Asymmetric synthesis of ?-(heteroaryl)alkylamines and ?-amino acids via nucleophilic 1,2-addition of lithiated heterocycles to aldehyde SAMP-hydrazones
作者:DIETER ENDERS
DOI:10.3906/kim-1302-71
日期:——
The asymmetric synthesis of \alpha-(heteroaryl)alkylamines was accomplished by employing a diastereoselective nucleophilic 1,2-addition of lithiated aromatic heterocycles to aldehyde SAMP-hydrazones, followed by BH_3 . THF or SmI_2 promoted removal of the chiral auxiliary. The CBz or benzoyl-protected amines were obtained in good yields (40\%--78\%) and excellent enantiomeric excesses (ee = 88\%--99\%). The methodology can be applied to the synthesis of highly enantioenriched \alpha-amino acids (ee = 90\%--99\%).