Using Calcium Carbide as an Acetylene Source for Cascade Synthesis of Pyrrolo[2,3-<i>b</i>
]quinoxalines <i>via</i>
Copper-Free <i>Sonogashira</i>
Coupling Reaction
A palladium‐catalyzed cascade protocol has been established for the synthesis of 4‐methyl‐1‐(1H‐pyrrolo[2,3‐b]‐quinoxalin‐2‐yl)cyclohexanols and 2‐phenyl‐1‐(1H‐pyrrolo[2,3‐b]quinoxalin‐2‐yl)propan‐1‐ols through the reaction of N‐alkyl(aryl)‐3‐chloroquinoxalin‐2‐amines with calcium carbide and cyclohexanones or 2‐phenylpropanal. This one‐pot process, carried out without any copper salt in the key step
钯催化的级联协议已建立的4-甲基-1-(1-合成ħ吡咯并[2,3- b ] -喹喔啉-2-基)环己醇和2-苯基-1-(1- ħ -吡咯并[2,3 - b ]喹喔啉-2-基)丙-1-醇通过N-烷基(芳基)-3-氯喹喔啉-2-胺与碳化钙和环己酮或2-苯基丙醛的反应而形成。此一锅法在Sonogashira偶联反应的关键步骤中不使用任何铜盐进行,提供了一种在催化量存在下合成2,3-二取代吡咯并[2,3- b ]喹喔啉的有效方法Pd(PPh 3)2 Cl 2的含量在DMSO / H 2 O中的产率很高。该策略的好处是使用市售的,廉价的和危害较小的主要化学原料碳化钙作为湿溶剂中的乙炔源。
Regioselective synthesis of 2,3-disubstituted 1-alkyl pyrrolo[2,3-b] quinoxalines through palladium-catalyzed Heck reaction of chalcones and evaluation of their anti-bacterial activities
The regioselective synthesis of 1-alkyl-2-aryl-3-acyl pyrrolo[2,3-b]quinoxalines through palladium-catalyzed Heck coupling reaction/heteroannulation was reported. The reaction of N-alkyl/benzyl-3-chloroquinoxaline-2-amines with chalcones catalyzed by Pd(OAc)2 in the presence of KOtBu, as the base, in DMSO afforded the desired products in good-to-high yields. The MIC and MBC determinations revealed
报道了通过钯催化的Heck偶联反应/杂环化反应的1-烷基-2-芳基-3-酰基吡咯并[2,3- b ]喹喔啉的区域选择性合成。的反应ñ -烷基/苄基-3-氯喹喔啉-2-胺与通过将Pd(OAC)催化查耳酮2在KO的存在吨卜,作为碱,在DMSO中,得到良好的到高的产率的期望的产物。MIC和MBC的测定表明,这些化合物可用于未来开发抗生素的研究工作中。
Novel one-pot synthesis of 1-alkyl-2-(aryloxy)methyl-1H-pyrrolo[2,3-b]quinoxalines via copper-free Sonogashira coupling reaction
efficient protocol is described for the synthesis of 1-alkyl-2-(aryloxy)methyl-1H-pyrrolo[2,3-b]quinoxalines via the one-pot reaction of phenol or 2-naphthol derivatives, propargyl bromide, and N-alkyl-3-chloroquinoxaline-2-amines in the presence of palladium catalyst. This one-pot reaction is carried out in the absence of any copper salt at room temperature. The reaction product is dependent on the nature
摘要描述了一种新颖,简单而有效的方案,用于通过苯酚或2-萘酚衍生物的一锅反应合成1-烷基-2-(芳氧基)甲基-1 H-吡咯并[2,3- b ]喹喔啉,炔丙基溴和N-烷基-3-氯喹喔啉-2-胺在钯催化剂的存在下。该一锅法反应在室温下在不存在任何铜盐的情况下进行。反应产物取决于所用碱的性质。使用吗啉作为碱,得到最终的环化产物,而三乙胺仅得到偶联产物。 图形概要
Rapid Synthesis of 2-Alkanol-substituted Pyrrolo[2,3-<i>b</i>
]quinoxalines from Propargylic Alcohols <i>via</i>
Copper-free Sonogashira Coupling Reaction at Room Temperature
efficient procedure is established for the synthesis of 2‐alkanol‐substituted pyrrolo[2,3‐b]quinoxalines by the reaction of N‐alkyl‐3‐chloroquinoxaline‐2‐amines with propargylic alcohols. The reaction is carried out in the absence of any copper salt but in the presence of a catalytic amount of Pd(PPh3)2Cl2 at room temperature. The Sonogashira coupling reaction step in this procedure is fast, producing
通过N-烷基-3-氯喹喔啉-2-胺与炔丙醇的反应,建立了一种实用且有效的程序,用于合成2-链烷醇取代的吡咯并[2,3- b ]喹喔啉。该反应在室温下在不存在任何铜盐但在催化量的Pd(PPh 3)2 Cl 2的存在下进行。此过程中的Sonogashira偶联反应步骤快速,可高产量生产清洁的产品,而不会受到不必要的均偶联Glaser反应产物的污染。还针对三种细菌菌株Luteus Luteus,铜绿假单胞菌(Pseudomonas aeruginosa),和枯草芽孢杆菌。
QUINOXALINE DERIVATIVES AS GPR6 MODULATORS
申请人:ENVOY THERAPEUTICS, INC.
公开号:US20150232469A1
公开(公告)日:2015-08-20
The present invention provides compounds of Formula (I):
that are GPR6 modulators and are therefore useful for the treatment of diseases treatable by modulation of GPR6, in particular treating Parkinson disease, levodopa induced dyskinesias, Huntington's disease, other dyskinesias, akinesias, and motor disorders involving dysfunction of the striatum, schizophrenia and drug addiction. Also provided are pharmaceutical compositions containing such compounds and processes for preparing such compounds.