新的“ 2-苯基萘”介导的苯并[ b ]萘[2,3 - d ]呋喃-6,11-二酮和6-氧杂苯并[ a ]蒽-5,7,12-三酮的合成合成6-氧杂苯并[ a ]蒽-5-酮
摘要:
我们在这里描述基于2-(2-溴苯基)-3-羟基-1,4-萘醌杂环化的苯并[ b ]萘并[2,3 - d ]呋喃-6,11-二酮的新型合成方法。萘醌由3-(2-溴苯基)萘-2-醇制备,它们是通过2- [3-(2-溴苯基)-2-氧代丙基]苯甲醛的分子内醇醛缩合反应获得的。或者,通过将3-(2-溴苯基)萘-2-醇环化为苯并[ b ]萘[2] ,可以更直接,更有效地获得苯并[ b ]萘[2,3 - d ]呋喃-6,11-二酮。,3- d ]呋喃和所得化合物的氧化。此外,第一个6-氧杂苯并[ a]从2- [3-(2-甲酰基苯基)-2-氧丙基]苯甲酸类似地获得所述的蒽蒽-5-酮,并将其氧化成6-氧杂苯并[ a ]蒽-5,7,12-三酮。
新的“ 2-苯基萘”介导的苯并[ b ]萘[2,3 - d ]呋喃-6,11-二酮和6-氧杂苯并[ a ]蒽-5,7,12-三酮的合成合成6-氧杂苯并[ a ]蒽-5-酮
摘要:
我们在这里描述基于2-(2-溴苯基)-3-羟基-1,4-萘醌杂环化的苯并[ b ]萘并[2,3 - d ]呋喃-6,11-二酮的新型合成方法。萘醌由3-(2-溴苯基)萘-2-醇制备,它们是通过2- [3-(2-溴苯基)-2-氧代丙基]苯甲醛的分子内醇醛缩合反应获得的。或者,通过将3-(2-溴苯基)萘-2-醇环化为苯并[ b ]萘[2] ,可以更直接,更有效地获得苯并[ b ]萘[2,3 - d ]呋喃-6,11-二酮。,3- d ]呋喃和所得化合物的氧化。此外,第一个6-氧杂苯并[ a]从2- [3-(2-甲酰基苯基)-2-氧丙基]苯甲酸类似地获得所述的蒽蒽-5-酮,并将其氧化成6-氧杂苯并[ a ]蒽-5,7,12-三酮。
A chemoselective iridium-catalyzed transfer hydrogenation of α, β-unsaturatedketones was realized in water. The CC double bonds of 2-benzylidene indanones and analogues were hydrogenated exclusively catalyzed by an iridium complex (0.1 mol%) bearing a pyridine-imidazoline ligand, using a mixture of formic acid/triethyl amine (molar ratio: 5/2) as a hydrogen source in water. A series of 2-benzyl indanones
Iminyl radicals, generated by 5-exo cyclisation of alkyl, vinyl and aryl C-centred radicals onto nitriles, undergo β-scission (nitrile translocation), reduction or tandem cyclisation onto alkenes depending on the nature of the α-substituent. 5-exo Cyclisations of aryl radicals onto nitriles undergo nitrile translocation when the α-substituent is CN, CO2R, SO2Ph or CONMe2. The rate of translocation
Enantioselective α‐Carbonylative Arylation for Facile Construction of Chiral Spirocyclic β,β′‐Diketones
作者:Ting Wu、Qinghai Zhou、Wenjun Tang
DOI:10.1002/anie.202101668
日期:2021.4.26
We herein describe the first enantioselective α‐carbonylative arylation, providing a diverse set of chiral spiro β,β′‐diketones bearing various ring sizes and functionalities in high yields and good to excellent enantioselectivities. Calculations suggest the transformation proceeds through reductive elimination instead of nucleophilic addition pathway.
[EN] PYRIDOPYRAZINE AND PYRIDOTRIAZINE INHIBITORS OF INFLUENZA VIRUS REPLICATION<br/>[FR] INHIBITEURS PYRIDOPYRAZINE ET PYRIDOTRIAZINE DE LA RÉPLICATION DU VIRUS DE LA GRIPPE
申请人:COCRYSTAL PHARMA INC
公开号:WO2020055858A8
公开(公告)日:2021-05-27
1,2- and 1,4-Naphthoquinones: general synthesis of benzo[b]naphtho[2,3-d]furan-6,11-diones
作者:Ana Martı́nez、Juan C Estévez、Ramón J Estévez、Luis Castedo
DOI:10.1016/s0040-4039(00)00201-x
日期:2000.4
A new general synthesis of benzo[b]naphtho[2,3-d]furan-6,11-diones starting from readily available 2-(2'-oxo-3'-phenylpropyl)benzaldehydes is described. (C) 2000 Elsevier Science Ltd. All rights reserved.