Chiral imidazole derivatives synthesis from enantiopure N-protected α-amino acids
摘要:
A route to the preparation of enantiopure ligands based on a 2-phenylimidazol ring is described. The stereogenic centre is placed into the chain bonded to the fourth carbon of the imidazole ring. The synthesis starts from inexpensive and readily available N-protected alpha-amino acids, as the source of chirality, which are converted into appropriate alpha-diazoketones and, consequently, into alpha-bromoketones. These alpha-bromoketones are good precursors for reactions with amidines to provide the imidazole ring. The deprotection into the final products was carried out using hydrogen. (c) 2005 Elsevier Ltd. All rights reserved.
Synthesis of amino acid-derived imidazoles from enantiopure N-protected α-amino glyoxals
摘要:
A range of novel imidazoles, including three histidine derivatives, with chiral side chains derived from amino acids and dipeptides have been synthesised from N-Cbz-protected alpha-amino glyoxals. (C) 2000 Elsevier Science Ltd. All rights reserved.
A range of novel imidazoles, including three histidine derivatives, with chiral side chains derived from amino acids and dipeptides have been synthesised from N-Cbz-protected alpha-amino glyoxals. (C) 2000 Elsevier Science Ltd. All rights reserved.
Chiral imidazole derivatives synthesis from enantiopure N-protected α-amino acids
作者:Filip Bureš、Jiří Kulhánek
DOI:10.1016/j.tetasy.2005.01.049
日期:2005.4
A route to the preparation of enantiopure ligands based on a 2-phenylimidazol ring is described. The stereogenic centre is placed into the chain bonded to the fourth carbon of the imidazole ring. The synthesis starts from inexpensive and readily available N-protected alpha-amino acids, as the source of chirality, which are converted into appropriate alpha-diazoketones and, consequently, into alpha-bromoketones. These alpha-bromoketones are good precursors for reactions with amidines to provide the imidazole ring. The deprotection into the final products was carried out using hydrogen. (c) 2005 Elsevier Ltd. All rights reserved.