Highly efficient synthesis of chiral aminoalcohols and aminodiols with camphane skeleton
摘要:
Methylidene substituted camphor was easily epoxidized to give bridgehead oxirane-substituted camphor in the form of two diastereoisomers, isolated in pure form. These were used in aminolysis reactions with different secondary amines leading to series of chiral aminoalcohols bearing a ketone functionality. The latter could be reduced by using LAH or DIBAL to a series of aminodiols. For the determination of the configuration of the newly formed stereogenic centre, advanced NMR experiments and X-ray crystallography were used. The new aminoalcohols and aminodiols were tested as pre-catalysts for the enantioselective addition of Et2Zn to benzaldehyde showing moderate enantioselectivity. (C) 2013 Elsevier Ltd. All rights reserved.
Antimycobacterial activity of chiral aminoalcohols with camphane scaffold
摘要:
A series of aminoalcohols were synthesized by reaction of aminolysis of camphor derived oxiranes with chosen amines. The compounds were evaluated for their in vitro activity against Mycobacterium tuberculosis H37Rv. Ten of the new structures show much higher activity than the classical anti-TB drug ethambutol. Some of the most active compounds were tested against MDR strain 43, and four of them demonstrated excellent activities with MICs 0.27-0.72 mu M. The cytotoxicity of representative exerting antimycobacterial activity compounds was assessed. Quantitative structure activity relationship (QSAR) model is derived to estimate the contribution of each structural fragment to the activity. The camphane-based aminoalcohols are promising lead compounds for further development of novel antimycobacterial agents. (C) 2014 Elsevier Masson SAS. All rights reserved.
Highly efficient synthesis of chiral aminoalcohols and aminodiols with camphane skeleton
作者:Malinka P. Stoyanova、Boris L. Shivachev、Rosica P. Nikolova、Vladimir Dimitrov
DOI:10.1016/j.tetasy.2013.08.015
日期:2013.11
Methylidene substituted camphor was easily epoxidized to give bridgehead oxirane-substituted camphor in the form of two diastereoisomers, isolated in pure form. These were used in aminolysis reactions with different secondary amines leading to series of chiral aminoalcohols bearing a ketone functionality. The latter could be reduced by using LAH or DIBAL to a series of aminodiols. For the determination of the configuration of the newly formed stereogenic centre, advanced NMR experiments and X-ray crystallography were used. The new aminoalcohols and aminodiols were tested as pre-catalysts for the enantioselective addition of Et2Zn to benzaldehyde showing moderate enantioselectivity. (C) 2013 Elsevier Ltd. All rights reserved.
Antimycobacterial activity of chiral aminoalcohols with camphane scaffold
A series of aminoalcohols were synthesized by reaction of aminolysis of camphor derived oxiranes with chosen amines. The compounds were evaluated for their in vitro activity against Mycobacterium tuberculosis H37Rv. Ten of the new structures show much higher activity than the classical anti-TB drug ethambutol. Some of the most active compounds were tested against MDR strain 43, and four of them demonstrated excellent activities with MICs 0.27-0.72 mu M. The cytotoxicity of representative exerting antimycobacterial activity compounds was assessed. Quantitative structure activity relationship (QSAR) model is derived to estimate the contribution of each structural fragment to the activity. The camphane-based aminoalcohols are promising lead compounds for further development of novel antimycobacterial agents. (C) 2014 Elsevier Masson SAS. All rights reserved.