Synthesis of N-protected α-amino aldehydes from their morpholine amide derivatives
摘要:
A new method for the synthesis of N-protected alpha-amino aldehydes was developed. N-Protected alpha-amino amides of morpholine were easily prepared and then reduced with LiAlH4 to produce clean N-protected alpha-amino aldehydes. This new scheme of synthesis can be used with Boc, Z and Fmoc amino-protecting groups. (C) 1999 Elsevier Science Ltd. All rights reserved.
The present invention relates to a compound of the formula: ##STR1## wherein R.sub.1 and Q are independently an optionally esterified or amidated carboxyl group; R.sub.2 is hydrogen, an acyl group or an optionally substituted hydrocarbon residue; X is a divalent hydrocarbon residue which may be substituted; or a salt thereof, which is useful as prophylactic and therapeutic agents of bone diseases and as agents for inhibiting thiol protease.
Dual‐protected amino acid derivatives as new antitubercular agents
作者:Pedro P. Castro、Débora L. Campos、Fernando R. Pavan、Giovanni W. Amarante
DOI:10.1111/cbdd.13315
日期:2018.8
drug-resistant rates. In an attempt to develop new antitubercular agents, 35 compounds were synthesized, most of them bearing a carbamate and enantiopure aminoacid moiety. These compounds had their activity evaluated toward a Mycobacterium tuberculosis strain (ATCC 27294) and cytotoxicity against fibroblast MRC-5 cells (ATCC CCL-171). Three of the prepared derivatives presented a good antimicrobial inhibition
Modular Ligands Derived from Amino Acids for the Enantioselective Addition of Organozinc Reagents to Aldehydes
作者:Meaghan L. Richmond、Christopher T. Seto
DOI:10.1021/jo0349375
日期:2003.9.1
series of modularchiralligands that are derived from aminoacids were prepared and tested for their ability to catalyze the asymmetric addition of alkylzinc reagents to aromatic and aliphatic aldehydes. The ligands contain a tertiary amine, an aminoacid side chain, and a carbamate or amide functional group. One ligand, which was synthesized from Ile, catalyzes the addition of diethylzinc to cyclo
Enantioselective Friedel–Crafts reactions between phenols and N-tosylaldimines catalyzed by a leucine-derived bifunctional catalyst
作者:Guo-Xing Li、Jin Qu
DOI:10.1039/c2cc31735d
日期:——
Enantioselective FriedelâCrafts reactions between phenols and N-tosylaldimines were developed using a bifunctional catalyst readily prepared from L-leucine. The chiral benzylic amine products were obtained in high yields (up to 96% yield) and good to high enantiomeric excesses (up to 95% ee).
[EN] SYNTHESIS OF (S)-2-AMINO-4-METHYL-1-((R)-2-METHYLOXIRANE-2-YL)-PENTAN-1-ONE AND PHARMACEUTICALLY ACCEPTABLE SALTS THEREOF<br/>[FR] SYNTHÈSE DE (S)-2-AMINO-4-MÉTHYL-1-((R)-2-MÉTHYLOXIRANE-2-YL)-PENTAN-1-ONE ET DE SES SELS PHARMACEUTIQUEMENT ACCEPTABLES
申请人:AMGEN INC
公开号:WO2018027021A1
公开(公告)日:2018-02-08
The present invention provides new methods for preparing compound (5), and pharmaceutically acceptable salts thereof, of structure. Compound (5), or a pharmaceutically acceptable salt thereof, is an important intermediate in the synthesis of carfilzomib. The invention further provides methods of making a useful manganese catalyst that may be used in the epoxidation step of the present invention.