Diastereoselective synthesis of enantiopure γ-amino-β-hydroxy acids by Reformatsky reaction of chiral α-dibenzylamino aldehydes
摘要:
N,N-Dibenzylamino aldehydes 1 react with Reformatsky's reagent leading to anti-gamma -dibenzylamino-beta -hydroxy esters 2 as the major stereoisomers. Treatment of 2 with TFA followed by hydrogenolysis on Pearlman's catalyst yields the corresponding-gamma -amino-beta -hydroxy acids 10. Contrarily, some N-butoxycarbonyl (Boc) amino aldehydes lead to syn-gamma -tert-butoxycarbonylamino-beta -hydroxy esters as the major product. (C) 2001 Elsevier Science Ltd. All rights reserved.
Diastereoselective synthesis of enantiopure γ-amino-β-hydroxy acids by Reformatsky reaction of chiral α-dibenzylamino aldehydes
摘要:
N,N-Dibenzylamino aldehydes 1 react with Reformatsky's reagent leading to anti-gamma -dibenzylamino-beta -hydroxy esters 2 as the major stereoisomers. Treatment of 2 with TFA followed by hydrogenolysis on Pearlman's catalyst yields the corresponding-gamma -amino-beta -hydroxy acids 10. Contrarily, some N-butoxycarbonyl (Boc) amino aldehydes lead to syn-gamma -tert-butoxycarbonylamino-beta -hydroxy esters as the major product. (C) 2001 Elsevier Science Ltd. All rights reserved.