2-硝基苯并呋喃和α-芳基-α-异氰基乙酸酯的非对映和对映选择性脱芳香形式[3 + 2]环加成得到带有3 a ,8 b -二氢-1 H -苯并呋喃[2,3- c ]的三环化合物具有三个连续立体中心的吡咯框架。该反应是通过铜醚有机催化剂实现的。获得的反应产物具有几乎完全的非对映选择性,并且对于许多取代的2-硝基苯并呋喃和异氰乙酸酯具有优异的对映体过量。
[EN] INHIBITORS OF THE KYNURENINE PATHWAY<br/>[FR] INHIBITEURS DE LA VOIE DE LA KYNURÉNINE
申请人:CURADEV PHARMA PRIVATE LTD
公开号:WO2014186035A1
公开(公告)日:2014-11-20
The present application provides novel inhibitors of indoleamine 2,3-dioxygenase-1 and/or indoleamine 2,3-dioxygenase-2 and/or tryptophan 2,3-dioxygenase, metabolites thereof, and phannaceutically acceptable salts or prodrugs thereof. Also provided are methods for preparing these compounds. A therapeutically effective amount of one or more of the compounds of formula (I) is useful in treating diseases resulting from dysregulation of the kynurenine pathway. Compounds of formula (I) act by inhibiting the enzymatic activity or expression of indoleamine 2,3-dioxygenase-1 and/or indoleamine 2,3-dioxygenase-2 and/or tryptophan 2,3-dioxygenase.
The nitration of 2-(trimethylstannyl)heteroarenes by tetranitromethane (TNM) or dinitrogentetroxide has been shown to be possible when the HOMO energy of the heteroaryltin is high enough to allow the formation of the corresponding radical cation. The reaction proceeds through a charge-transfer complex between heteroaryltin and TNM, followed by a single-electron transfer, which is enhanced under sunlamp
Phosphine-catalyzed dearomative [3+2] annulation of 3-nitroindoles and allenoates
作者:Kui Liu、Gang Wang、Shao-Jie Cheng、Wen-Feng Jiang、Cheng He、Zhi-Shi Ye
DOI:10.1016/j.tetlet.2019.06.016
日期:2019.7
dearomative [3+2] annulation of 3-nitroindoles with allenoates has been successfully developed, providing a facile access to cyclopenta[b]indolines with good to excellent yields and high diastereoselectivities. This strategy features mild reaction conditions, high functional group tolerance, and scalability. Additionally, the 2-nitrobenzofuran and 2-nitrobenzothiophene were good dearomative [3+2] annulation
已经成功开发了有效的膦催化的3-硝基吲哚与脲基甲酸酯的脱芳族环氧化物[3 + 2]环化反应,可轻松获得环戊二烯[ b ]吲哚,并具有良好或优异的收率和较高的非对映选择性。该策略具有温和的反应条件,较高的官能团耐受性和可扩展性。此外,2-硝基苯并呋喃和2-硝基苯并噻吩是良好的脱芳香性[3 + 2]环空伙伴。
Synthesis of Benzothienobenzofurans via Annulation of Electrophilic Benzothiophenes with Phenols
作者:Akhil Krishnan R.、Sheba Ann Babu、Nitha P. R.、Jagadeesh Krishnan、Jubi John
DOI:10.1021/acs.orglett.1c00219
日期:2021.3.5
route toward benzothieno[3,2-b]benzofurans by the annulation of 3-nitrobenzothiophene with phenols. The reaction was found to be general with a range of substituted phenols. In addition, we could extend the methodology for the synthesis of pentacenes and could demonstrate the synthesis in gram-scale. Moreover, we extended the strategy for the synthesis of benzothieno[2,3-b]benzofurans by starting from
通过3-硝基苯并噻吩与酚的环合反应,我们已经开发出了一种无金属的,温和的,绿色的合成苯并噻吩并[3,2- b ]苯并呋喃的合成路线。发现该反应通常与一系列取代的苯酚反应。此外,我们可以扩展戊烯的合成方法,并以克为单位论证合成方法。此外,我们从2-硝基苯并噻吩开始扩展了苯并噻吩并[2,3- b ]苯并呋喃的合成策略。
Regio‐ and Stereoselective Cascade of β,γ‐Unsaturated Ketones by Dipeptided Phosphonium Salt Catalysis: Stereospecific Construction of Dihydrofuro‐Fused [2,3‐b] Skeletons
作者:Hongkui Zhang、Jiajia He、Yayun Chen、Cheng Zhuang、Chunhui Jiang、Kai Xiao、Zhishan Su、Xiaoyu Ren、Tianli Wang
DOI:10.1002/anie.202106046
日期:2021.9
heterocyclic molecules in high yields with excellent stereoselectivities. Moreover, mechanistic investigations revealed that the bifunctional phosphonium salt controlled the regio- and stereoselectivities of this cascade reaction, particularly proceeding through the initial ketone α-addition followed by O-participated substitution; and the multiple hydrogen-bonding interactions between Brønstedacid moieties