Tandem Sonogashira-Hagihara Coupling/Cycloisomerization Reactions of Ethynylboronic Acid MIDA Ester to Afford 2-Heterocyclic Boronic Acid MIDA Esters: A Concise Route to Benzofurans, Indoles, Furopyridines and Pyrrolopyridines
摘要:
A one-pot process that provides direct access to 2-heterocyclic MIDA (N-methyliminodiacetic acid) boronates has been developed. The reaction of 2-iodophenols or 2-iodoanilines with ethynylboronic acid MIDA ester readily afforded 2-substituted heterocyclic compounds. Amidine and phosphazene bases, especially TMG (1,1,3,3-tetramethylguanidine) assumed an important role in the tandem Sonogashira-Hagihara coupling/cycloisomerization reactions.
Synthesis of 2-BMIDA 6,5-bicyclic heterocycles by Cu(<scp>i</scp>)/Pd(0)/Cu(<scp>ii</scp>) cascade catalysis of 2-iodoaniline/phenols
作者:Ciaran P. Seath、Kirsty L. Wilson、Angus Campbell、Jenna M. Mowat、Allan J. B. Watson
DOI:10.1039/c6cc04554e
日期:——
A one-pot cascade reaction for the synthesis of 2-BMIDA 6,5-bicyclic heterocycles has been developed using Cu(I)/Pd(0)/Cu(II) catalysis. 2-Iodoanilines and phenols undergo a Cu(I)/Pd(0)-catalyzed Sonogashira reaction with ethynyl BMIDA followed by...
An Efficient One-Pot Synthesis of Benzo[4,5]imidazo[1,2-<i>a</i>]quinoxalines <i>via</i> Copper-Catalyzed Process
作者:Aiping Huang、Yimu Chen、Yige Zhou、Wei Guo、Xiaodong Wu、Chen Ma
DOI:10.1021/ol4026292
日期:2013.11
A copper-catalyzed one-pot process for the construction of benzo[4,5]imidazo[1,2-a]quinoxalines under air is described. Aryl chlorides, aryl bromides, and aryl iodides can be applied to the synthesis of these compounds.
描述了在空气下构造苯并[4,5]咪唑并[1,2- a ]喹喔啉的铜催化一锅法。芳基氯化物,芳基溴化物和芳基碘化物可用于这些化合物的合成。
One-pot multi-step cascade protocols toward β-indolyl sulfoximidoyl amides <i>via</i> intermolecular trapping of an α-indolylpalladium complex by CO
作者:Huahua Liu、Li Wei、Zhiyuan Chen
DOI:10.1039/d1ob00128k
日期:——
were efficiently prepared from ortho-iodoanilines, propargyl bromides, 1 atm of CO, and substituted NH-sulfoximines, through a palladium-catalyzed indole annulation/carbonyl insertion/C–N bond formation cascade. Mostly good to high yields of the products were obtained through this multi-step, one-pot reaction protocol under very gentle reactionconditions. The obtained β-indolyl sulfoximidoyl amides could
通过钯催化的吲哚环化/羰基插入/C-N 键形成级联反应,由邻碘苯胺、炔丙基溴、1 atm CO 和取代的N H-亚砜亚胺有效地制备了各种 β-吲哚亚磺酰亚胺酰胺。在非常温和的反应条件下,通过这种多步骤、一锅法反应方案获得了大部分好到高产率的产物。获得的 β-吲哚亚磺酰亚胺酰胺可以转化为含有色胺部分的具有生物学意义的亚砜亚胺类似物。
Vinylogous Elimination/Heck Coupling/Allylation Domino Reactions: Access to 2-Substituted 2,3-Dihydrobenzofurans and Indolines
作者:Jianguo Yang、Hanjie Mo、Xiuxiu Jin、Dongdong Cao、Haijian Wu、Di Chen、Zhiming Wang
DOI:10.1021/acs.joc.7b02986
日期:2018.3.2
aryl allyl ethers derived from the phosphine-catalyzed addition of electron-deficientallenes with phenol are found to be efficient substrates for the synthesis of 2-substituted 2,3-dihydrobenzofurans and indolines. It is the first example of aryl allyl ether used as an ideal and practical precursor of hard to get functionalized 1,3-butadiene for the heterocyclic compound synthesis.
Cu-Catalyzed ligand-free synthesis of rosuvastatin based novel indole derivatives as potential anticancer agents
作者:K. Shiva Kumar、Bandari Rajesham、Meesa Siddi Ramulu、Boyapally Bhaskar、Surjya Narayan Dash、Mohd Ashraf Ashfaq、Raju Nagarapu、Aleem Ahmed Khan、Sanna Lehtonen、Manojit Pal
DOI:10.1039/c6ra20148b
日期:——
Rosuvastatin basednovel indole derivatives designed as potential anti-cancer agents were synthesized via a newly developed ligand-free, simple, straightforward and inexpensive one-pot method. The methodology involved a Cu-catalyzed coupling-cyclization of...