提出了一种有效的反应级联反应,该反应级联反应提供了一系列带有膦酸酯或氧化膦部分的吡咯并[1,2- a ]喹啉。该序列利用策略性的[2,3]-σ重排,然后通过相邻的吡咯环捕获所得的丙二烯,将炔丙醇原位转化为瞬时的丙二烯。此外,最初的小规模分批工艺已成功转化为连续流工艺,可有效制备多克级选定的吡咯并[1,2- a ]喹啉,而无需担心由于反应固有的放热曲线而引起的安全隐患。
Nickel-Catalyzed Cyclization Strategy for the Synthesis of Pyrroloquinolines, Indoloquinolines, and Indoloisoquinolines
作者:Sampath Thavaselvan、Kanniyappan Parthasarathy
DOI:10.1021/acs.orglett.0c01055
日期:2020.5.15
An inexpensive and benchtop stable Ni-catalyst/Zn system for the synthesis of pyrrolo/indoloquinolines and indolo[2,1-a]isoquinolines is explored. This platform provides a one-pot entry for the preparation of various pyrrolo and indoloquinolines/isoquinolines, which involves successive C-C and C-N bond formation, respectively. In addition, we have also performed the preliminary photophysical studies
One-Pot Synthesis of Pyrrolo[1,2-<i>a</i>]quinoxaline Derivatives via a Copper-Catalyzed Aerobic Oxidative Domino Reaction
作者:Huanhuan Liu、Tiantian Duan、Zeyuan Zhang、Caixia Xie、Chen Ma
DOI:10.1021/acs.orglett.5b01167
日期:2015.6.19
A copper-catalyzed process for the synthesis of pyrrolo[1,2-a]quinoxalines from readily available α-amino acids and 1-(2-halophenyl)-1H-pyrroles is described. Different functional groups were well tolerated to give the corresponding products.
描述了一种铜催化的方法,该方法由容易获得的α-氨基酸和1-(2-卤代苯基)-1 H-吡咯合成吡咯并[1,2- a ]喹喔啉。不同的官能团具有良好的耐受性,可提供相应的产品。
Mechanistic Studies of Pd-Catalyzed Regioselective Aryl CH Bond Functionalization with Strained Alkenes: Origin of Regioselectivity
作者:David I. Chai、Praew Thansandote、Mark Lautens
DOI:10.1002/chem.201100210
日期:2011.7.11
Mechanisticstudies of a palladium‐catalyzed regioselective aryl CH functionalization of 2‐pyrrole phenyl iodide with norbornene are presented. Kinetic and spectroscopic analyses together with crystallographic data provide evidence for intermediates in a proposed stepwise mechanism. On the basis of the mechanisticstudies, the origin of the regioselectivity is due to a ligand exchange between I− and
Pd‐Catalyzed One‐Pot Sequential Sonogashira Coupling and Dual Annulations Cascade for the Synthesis of Benzofuro[3,2‐
<i>c</i>
]‐Triazalo/Pyrrolo‐Quinolines
作者:Dipak B. Deokar、Soumi Laha、B. Sridhar、Dharmendra Kumar Tiwari、Pravin R. Likhar
DOI:10.1002/adsc.202200785
日期:2022.11.22
Palladium-catalyzed coupling reaction followed by dual annulation has been achieved for the synthesis of various triazolo/pyrrolo fused benzofuro-quinolines from readily available starting materials. The developed protocol proceeds through palladium-catalyzed Sonogashira coupling, benzannulation followed by C−Hactivation triggered second annulationreactioncascades in a single pot. In particular
and straightforward approach for the synthesis of fused quinoxalinones via palladium-catalyzedcascade carbonylative cyclization of 2-heteroaryl iodobenzene and NaN3 has been achieved. The transformation might undergo cascade carbonylation, formation of acyl azide, a Curtius rearrangement, and an intramolecular cyclization sequence. The obtained heterocycle products can be easily transformed into other
通过钯催化的 2-杂芳基碘苯和 NaN 3的级联羰基环化合成稠合喹喔啉酮的简单直接的方法已经实现。该转化可能经历级联羰基化、酰基叠氮化物的形成、Curtius 重排和分子内环化序列。获得的杂环产品可以很容易地转化为其他结构多样的有价值的化合物,这证明了所开发协议的综合效用。