Photoinduced reactions. 39. Photochemistry of the imide system. 9. Norrish type I reaction of aliphatic cyclic imides. General reaction pattern, competition with type II processes, and some synthetic application
The present disclosure relates to a series of tricyclic compounds and the use thereof as receptor agonists of sphingosine-1-phosphate subtype 1 (S1P1), and in particular relates to compounds as shown in formula (I) or pharmaceutically acceptable salts thereof.
Intermolecular Photocycloaddition of Ring-Substituted Cyclic Dithioimides with 2,3-Dimethyl-2-butene: A Facile Synthesis of Spiro-Thietanes
作者:Kazuaki Oda、Minoru Machida、Yuichi Kanaoka
DOI:10.1055/s-1986-31772
日期:——
Upon irradiation, unsymmetrically 3-substituted and symmetrical bicyclic dithiosuccinimides undergo photocycloaddition with 2,3-dimethyl-2-butene to give various spiro-thietanes, including highly strained multicycles.
Synthesis of Chiral γ-Lactams via in Situ Elimination/Iridium-Catalyzed Asymmetric Hydrogenation of Racemic γ-Hydroxy γ-Lactams
作者:Qianjia Yuan、Delong Liu、Wanbin Zhang
DOI:10.1021/acs.orglett.7b00651
日期:2017.4.7
Chiral γ-lactams have been synthesized in excellent yields and enantioselectivities (up to 99% yield and 96% ee) from easily accessible racemic γ-hydroxy γ-lactams via an iridium-phosphoramidite catalyzed asymmetric hydrogenation. The reaction was designed based on insight into the reaction mechanism demonstrated in previous work and can be carried out at a reduced catalyst loading of 0.1 mol % on
The present invention provides a compound of formula I;
or a pharmaceutically acceptable salt thereof, wherein the variables R
1
, R
2
, R
3
, R
4
, R
5
, and A-B are defined herein, which are non-immunosuppresive, cyclophilin-binding, mPTP blockers and are therefore useful for the prevention or treatment of diseases or disorders such as HCV infection, stroke, multiple sclerosis, HBV infection, HPV infection, asthma, cancer, muscular dystrophy, sepsis, ischemia/reperfusion injury, and heart failure.
DIKETOHYDRAZINE DERIVATIVE COMPOUNDS AND DRUGS CONTAINING THE COMPOUNDS AS THE ACTIVE INGREDIENT
申请人:Hatayama Akira
公开号:US20100087442A1
公开(公告)日:2010-04-08
The present invention relates to a diketohydrazine derivative of formula (I) and a pharmaceutically acceptable salt thereof (the symbols in the formula have the same meaning as described in the specification).
The compound of formula (I) has an inhibitory activity against cysteine protease, and it is useful for the treatment of inflammatory diseases, immune diseases, ischemic diseases, respiratory diseases, circulatory diseases, blood diseases, neuronal diseases, hepatic or biliary diseases, osseous or articular diseases, metabolic diseases, etc. And the compound has inhibitory activity against elastase and it is also useful for the treatment of COPD (chronic obstacle pulmonary diseases).