从相应的膦酸酯单酯制备了一系列膦酰氯,并使用 31 P NMR 光谱研究了它们与醇、胺和双亲核试剂 4-氨基丁-1-醇的反应。在通过加入亚硫酰氯或草酰氯将膦酸单酯转化为膦酰氯时,发现焦膦酸酐很容易作为副产物形成。酸酐很容易与醇反应,但比相应的膦酰氯反应更慢,而且与胺反应也很缓慢,如果有的话。因此,在制备膦酰胺时,必须抑制酸酐的形成。这是在将单酯添加到氯化剂中时完成的。不受阻碍的膦酰氯主要与 4-氨基丁-1-醇的氨基官能团反应以提供膦酰胺,而空间位阻的膦酰氯表现出对 O 偶联的偏好。该结果表明在 P−O b 期间获得的能量...
从相应的膦酸酯单酯制备了一系列膦酰氯,并使用 31 P NMR 光谱研究了它们与醇、胺和双亲核试剂 4-氨基丁-1-醇的反应。在通过加入亚硫酰氯或草酰氯将膦酸单酯转化为膦酰氯时,发现焦膦酸酐很容易作为副产物形成。酸酐很容易与醇反应,但比相应的膦酰氯反应更慢,而且与胺反应也很缓慢,如果有的话。因此,在制备膦酰胺时,必须抑制酸酐的形成。这是在将单酯添加到氯化剂中时完成的。不受阻碍的膦酰氯主要与 4-氨基丁-1-醇的氨基官能团反应以提供膦酰胺,而空间位阻的膦酰氯表现出对 O 偶联的偏好。该结果表明在 P−O b 期间获得的能量...
A new catalytic process for allyl ester cleavage has been developed by using a robust cationic CpRu(IV) π-allyl complex of 2-quinolinecarboxylic acid that can be stored for over six months in air without any loss of catalytic activity. The deprotection of various alcohols and acids can be attained simply with high reactivity and chemoselectivity under mild conditions. Furthermore, with continuous removal
Solid-phase synthesis of protected α-amino phosphonic acid oligomers
作者:Yoshitaka Ishibashi、Masato Kitamura
DOI:10.1039/b912231a
日期:——
By establishing both a highly efficient phosphonamidate formation and a RuCp-catalyzed cleavage of an allyl linker, the solid-phase synthesis of Fmoc-(GlyP(OBn))6-OH/DIEA, a protected form of a new type of unnatural peptide α-amino phosphonic acid oligomer (APO), has been realized.
The present invention provides a method of treating viral infections by using antiviral substituted indolizino\x9b1,2-b!quinolinone compounds, antiviral substituted indolizino\x9b1,2-b!quinolinone compounds, and pharmaceutical compositions thereof.