Synthesis and Peptidyl-Prolyl Isomerase Inhibitory Activity of Quinoxalines as Ligands of Cyclophilin A
作者:Feng Wang、Jing Chen、Xuejun Liu、Xu Shen、Xuchang He、Hualiang Jiang、Donglu Bai
DOI:10.1248/cpb.54.372
日期:——
In search of small molecule compounds as the ligands of cyclophilin A, a series of quinoxalines were prepared, and their Kd values of cyclophilin A and IC50 values for peptidyl-prolyl isomerase activity of cyclophilin A were tested. The results suggest that some quinoxalines are promising ligands of cyclophilin A.
<i>o</i>-Iodoxybenzoic Acid (IBX) as a Viable Reagent in the Manipulation of Nitrogen- and Sulfur-Containing Substrates: Scope, Generality, and Mechanism of IBX-Mediated Amine Oxidations and Dithiane Deprotections
作者:K. C. Nicolaou、Casey J. N. Mathison、Tamsyn Montagnon
DOI:10.1021/ja0400382
日期:2004.4.28
o-Iodoxybenzoic acid (IBX), a highly versatile hypervalent iodine(V) reagent, was found to efficiently mediate the dehydrogenation of amines in addition to facilitating the oxidative cleavage of dithioacetals and dithioketals. Through the development of relevant IBX-based protocols, a plethora of useful synthetic intermediates, including imines, oximes, ketones, and aromatic N-heterocycles, were found
Absolute Configurational Assignments of Secondary Amines by CD-Sensitive Dimeric Zinc Porphyrin Host
作者:Xuefei Huang、Naoko Fujioka、Gennaro Pescitelli、Frank E. Koehn、R. Thomas Williamson、Koji Nakanishi、Nina Berova
DOI:10.1021/ja020520p
日期:2002.9.1
determination of absoluteconfiguration of secondary amines including acyclic and cyclic aliphatic amines, aromatic amines, aminoacids, and amino alcohols is described. The chiral substrate is linked to the achiral carrier moiety (3-N-Boc-amino-propyl-N-Boc-amino)acetic acid 1 (BocHNCH(2)CH(2)CH(2)BocNCH(2)COOH), which after deprotection, yields a bidentate conjugate, capable of forming a 1:1 host/guest complex
描述了用于确定仲胺绝对构型的一般手性实验方案,包括无环和环状脂肪胺、芳香胺、氨基酸和氨基醇。手性底物连接到非手性载体部分(3-N-Boc-氨基-丙基-N-Boc-氨基)乙酸1(BocHNCH(2)CH(2)CH(2)BocNCH(2)COOH),脱保护后,产生双齿缀合物,能够与二聚锌卟啉宿主 2 形成 1:1 的宿主/客体复合物。与早先报道的伯胺和仲醇的情况一样,仲胺缀合物与卟啉镊子宿主的络合图2表示立体分化过程,其中立体中心的大(L)基团(基于构象能A值指定)从卟啉结合口袋突出。这导致形成具有优选的卟啉螺旋的宿主/客体复合物,表现出强烈的激子分裂 CD 光谱。尽管仲胺偶联物的叔酰胺键周围的 Z/E 构象复杂性极大地阻碍了先前的构型分配,但发现卟啉扭曲的手性意义明显受立体中心控制。因此,在取代基的相对空间大小没有歧义的情况下,观察到的 CD 对可以用于直接分配绝对构型。此外,为了将应用扩展
Method of preparation of (s)-n-tert-butyl-1,2,3,4-tetrahydroisoquinoline-3-carboxamide
申请人:——
公开号:US20040034056A1
公开(公告)日:2004-02-19
A new method is described here for the synthesis of (S)-N-tert-butyl-1,2,3,4-tetrahydroiso-quinoline-3-carboxamide comprising the following steps:
a) (3S)-1,2,3,4-tetrahydroisoquinoline-3-carboxylic acid is reacted with formic acid to give the compound of formula:
1
b) the compound thus obtained is reacted with tert-butylamine to give the compound of formula:
2
c) the compound thus obtained is then treated with acids to give the desired compound.
The method in question makes it possible to obtain (S)-N-tert-butyl-1,2,3,4-tetrahydroiso-quinoline-3-carboxamide with high yields and purity without using toxic and hazardous reagents.
1,2,3,4-Tetrahydro-2-isoquinoline-derivatives of the formula ##STR1## wherein R signifies hydroxy, lower alkylamino, lower alkoxy or phenyl-C.sub.2-6 -alkoxy which can carry one or more lower alkyl or lower alkoxy substituents on the phenyl ring, can be manufactured by cyclizing a phenethylamine derivative of the formula ##STR2## wherein Z signifies benzyloxycarbonyl and R" signifies hydroxy, lower alkylamino, lower alkoxy or phenyl-lower-alkoxy which can carry one or more lower alkyl or lower alkoxy substituents on the phenyl ring, with formaldehyde in the presence of sulphuric acid in acetic acid to a corresponding tetrahydroisoquinoline derivative of the formula ##STR3## and cleaving off the group Z in the compound obtained.
公式如下:1,2,3,4-四氢-2-异喹啉衍生物的式子为 ##STR1## 其中 R 表示羟基、低烷基氨基、低烷氧基或苯基-C.sub.2-6-烷氧基,它可以在苯环上携带一个或多个低烷基或低烷氧基取代基,可以通过在乙酸中的硫酸存在下,将公式为 ##STR2## 的苯乙胺衍生物环化制造成相应的四氢异喹啉衍生物,然后裂解得到化合物中的 Z 基团。