The present invention relates to substituted piperidines of the general formula (I),
where R1, R2, R3, R4, R5, Q and X have the definitions elucidated in more detail in the description, to a process for their preparation and to the use of these compounds as medicines, in particular as renin inhibitors. Moreover, the enzymatic substrate portion of the compound is simultaneously a substrate for a membrane transporter.
tripeptide methyl esters [Z-/Boc-5 to -12(pept)] was prepared using the amino acids glycine, alanine and valine. In both the alanine and the valine series a single glycine unit was introduced and its position inside the tripeptide framework was systematically varied. Reaction of these 16 tripeptide derivatives with the organometallic reagent [Cp2TiCH3(THF)+][BPh4−] (13) resulted in the formation of
Copper(II) chloride was found to be an extremely efficientadditive suppressing racemization in the carbodiimide mediated couplings.
发现氯化铜(II)是抑制碳二亚胺介导的偶联中外消旋作用的极其有效的添加剂。
Slebioda, Marek; St-Amand, Marc A.; Chen, Francis M. F., Canadian Journal of Chemistry, 1988, vol. 66, p. 2540 - 2544
作者:Slebioda, Marek、St-Amand, Marc A.、Chen, Francis M. F.、Benoiton, N. Leo
DOI:——
日期:——
Total synthesis of emericellamides A and B
作者:Shuo Li、Shuo Liang、Wenfei Tan、Zhengshuang Xu、Tao Ye
DOI:10.1016/j.tet.2009.01.082
日期:2009.3
The total synthesis of emericellamides A and B is reported. A convergent, flexible strategy employing peptide chemistry, asymmetric alkylations, and culminating in macrolactamization is described The. previously reported structure of both compounds is confirmed. (c) 2009 Elsevier Ltd. All rights reserved.