The Bip Method, Based on the Induced Circular Dichroism of a Flexible Biphenyl Probe in Terminally Protected -Bip-Xaa*- Dipeptides, for Assignment of the Absolute Configuration of β-Amino Acids
作者:Laurence Dutot、Karen Wright、Anne Gaucher、Michel Wakselman、Jean-Paul Mazaleyrat、Marta De Zotti、Cristina Peggion、Fernando Formaggio、Claudio Toniolo
DOI:10.1021/ja800059d
日期:2008.5.1
An induced axial chirality of the biphenyl core of the Bip (2',1':1,2;1'',2'':3,4-dibenzcyclohepta-1,3-diene-6-amino-6-carboxylic acid) residue in the terminally protected dipeptides Boc-Bip-beta-Xaa*-OMe (beta-Xaa* = L-beta(3)-HAla, L-beta(3)-HVal, L-beta(3)-HLeu, L-beta(3)-HPro, trans-(1S,2S)-ACHC, trans-(1R,2R)-ACHC, trans-(1S,2S)-ACPC, trans-(1R,2R)-ACPC) resulted in an induced circular dichroism
Bip 联苯核的诱导轴向手性 (2',1':1,2;1'',2'':3,4-dibenzcyclohepta-1,3-diene-6-amino-6-carb acid ) 末端保护的二肽 Boc-Bip-beta-Xaa*-OMe (beta-Xaa* = L-beta(3)-HAla, L-beta(3)-HVal, L-beta(3)-HLeu, L-beta(3)-HPro, trans-(1S,2S)-ACHC, trans-(1R,2R)-ACHC, trans-(1S,2S)-ACPC, trans-(1R,2R)-ACPC)在诱导圆二色性中,揭示了 Bip 方法在可靠和快速分配手性 β-氨基酸的绝对构型方面的有用性。值得注意的是,Bip 方法还应用于独特的自旋标记、环状、β-氨基酸顺式/反式-β-TOAC 和反式-POAC。特别是,这项研究允许分配后一种化合物的对映异构体的未知绝对构型。