研究了以空气稳定的取代戊-4-烯-1-基硼酸酯为原料制备多取代双环[3.1.0]己烷。该方法涉及与LiCHCl 2 的Matteson同系化,产生1-氯己基-5-en-1-基硼酸酯中间体。随后的分子内环丙烷化步骤以一锅法进行。对于频哪醇硼酸酯,环丙烷化步骤可以在 140 °C 下进行,也可以在原位酯交换后在 70 °C 下进行,形成儿茶酚硼酸酯。最后一种方法适用于使用手性辅助控制或利用金雀花碱控制的醇对映选择性硼烷基化来制备对映体富集的双环[3.1.0]己烷。
Use of extracts from aristolochia in the treatment of AIDS
申请人:PROTEOME SCIENCES PLC
公开号:US20020099086A1
公开(公告)日:2002-07-25
This invention relates to the use of extracts and compounds derived from the plant
Aristolochia taliscana
and their analogues in the treatment of AIDS.
作者:Suvit Thaisrivongs、Donald T. Pals、Steve R. Turner、Lisa T. Kroll
DOI:10.1021/jm00402a021
日期:1988.7
A model of the conformation of the enzyme-bound inhibitor of human renin suggested the possibility of a gamma-lactam conformational restriction at the P2-P3 site. Synthetic routes to these gamma-lactam dipeptide isosteres and their incorporation into potential renin inhibitors are described. Peptide VIa,b with a gamma-lactam conformational constraint and a hydroxyethylene isostere at the cleavage site
Therapeutic compositions comprising at least one 8-substituted-dibenzylbutyrolactone lignan, preferably a lignan is selected from the group of nortrachelogenin, diasteromeric forms of nortrachelogenin, isomeric forms of nortrachelogenin and combinations thereof as well as 8-methylmatairesinol and 8-methyldimethylmatairesinol, for use in a method of treating cancer or a similar condition wherein the growth factor signaling pathway of a mammal is deregulated. The invention also provides therapeutic pharmaceutical combinations comprising a hydroxy-dibenzylbutyrolactone lignan and at least one TRAIL receptor agonist. The hydroxy-dibenzylbutyrolactone lignans and a TRAIL receptor agonist can be used as a combined preparation for administration to a patient simultaneously, separately or spaced out over a period of time in treating cancer.
Therapeutic compositions comprising at least one 8-substituted-dibenzylbutyrolactone lignan, preferably a lignan is selected from the group of nortrachelogenin, diasteromeric forms of nortrachelogenin, isomeric forms of nortrachelogenin and combinations thereof as well as 8-methylmatairesinol and 8-methyldimethylmatairesinol, for use in a method of treating cancer or a similar condition wherein the growth factor signaling pathway of a mammal is deregulated. The invention also provides therapeutic pharmaceutical combinations comprising a hydroxy-dibenzylbutyrolactone lignan and at least one TRAIL receptor agonist. The hydroxy-dibenzylbutyrolactone lignans and a TRAIL receptor agonist can be used as a combined preparation for administration to a patient simultaneously, separately or spaced out over a period of time in treating cancer.
Redox‐Neutral Multicatalytic Cerium Photoredox‐Enabled Cleavage of O−H Bearing Substrates
作者:Avery O. Morris、Louis Barriault
DOI:10.1002/chem.202400642
日期:——
An approach toward general β C−C bond scission reactions of carboxylicacids and hemiacetals is presented. The present work demonstrates the power of a multicatalytic cerium-based photoredox platform to enable direct hydrodecarboxylation of carboxylicacids as well as redox-neutral ring cleavage of lactol derivatives.