primary amines under the standard conditions, the bis(N‐phenyl) products were predominantly formed. This method was also applicable to the synthesis of bioactive N‐phenyl amino acid derivatives. The control experiments, the deuterium labelling study, and the presence of regioisomers of N‐arylated products when using 4‐substituted triarylsulfonium triflates suggested that the reaction might proceed through
本文介绍了一种简单有效的三芳基ulf三氟甲磺酸酯对各种胺进行无过渡金属N-芳基化的方法。在t BuOK或KOH存在下,脂族和芳族胺均在80°C下平稳转化,从而以高至高收率获得了相应的单N芳基化产物。反应物的摩尔比和碱的选择对反应有很大的影响。当在标准条件下将大量过量的[Ph 3 S] [OTf]和t BuOK用于伯胺时,主要形成了双(N-苯基)产物。该方法也适用于生物活性氮的合成-苯基氨基酸衍生物。对照实验,氘标记研究以及使用4-取代的三芳基ulf三氟甲磺酸酯时N芳基化产物的区域异构体的存在表明,该反应可能会通过芳烃中间体进行。本方案证明,三芳基ulf盐在C Ar -N键的构建中是通用的芳基化试剂。
Visible‐Light‐Enabled Direct Decarboxylative N‐Alkylation
作者:Vu T. Nguyen、Viet D. Nguyen、Graham C. Haug、Ngan T. H. Vuong、Hang T. Dang、Hadi D. Arman、Oleg V. Larionov
DOI:10.1002/anie.201916710
日期:2020.5.11
development of efficient and selective C-N bond-forming reactions from abundant feedstock chemicals remains a central theme in organic chemistry owing to the key roles of amines in synthesis, drug discovery, and materials science. Herein, we present a dual catalyticsystem for the N-alkylation of diverse aromatic carbocyclic and heterocyclic amines directly with carboxylicacids, by-passing their preactivation
The compound represented by the following formula (I) and the like have PAI-1 inhibition activity;
wherein: R
1
represents a C
6-10
aryl group which may be substituted or the like; T represents a single bond or the like; m represents 0 or 1; when m is 0, G represents —N—C(═O)—CO
2
H or the like; when m is 1, G represents an oxygen atom or the like; R
2
represents a C
6-10
aryl group which may be substituted or the like; E represents the following formula (II) wherein one of R
31
, R
32
, R
33
and R
34
represents the formula R
1
-T-, each of the other three independently represents a hydrogen atom or the like, and R
35
represents the formula —X—Y′, a hydrogen atom or the like; X represents —CH
2
— or the like; Y′ represents a carboxy group or the like; M represents a single bond or the like.
Steroids, their preparation, pharmaceutical compositions thereof and uses of the compounds
申请人:Shanghai Zhongxi Pharmaceutical Co., Ltd.
公开号:US06514956B1
公开(公告)日:2003-02-04
The present invention concerns with steroid compounds of formula (I)
wherein R1 is cyclohexyl or cycloheptyl, R2 is hydrogen or C1-C6 alkyl, R3 is hydrogen, C1-C6 alkyl or methylol, R4 is hydrogen or hydroxymethylene and a pharmaceutically acceptable salt thereof. The invention also concerns with a method for preparation of the compounds, pharmaceutical compositions containing the compounds as its active component and use of the compounds and the pharmaceutical compositions in preparing medicines for treating diseases, e.g. those associated with progestin dependence.