General and Mild Nickel-Catalyzed Cyanation of Aryl/Heteroaryl Chlorides with Zn(CN)<sub>2</sub>: Key Roles of DMAP
作者:Xingjie Zhang、Aiyou Xia、Haoyi Chen、Yuanhong Liu
DOI:10.1021/acs.orglett.7b00732
日期:2017.4.21
A new and general nickel-catalyzed cyanation of hetero(aryl) chlorides using less toxic Zn(CN)2 as the cyanidesource has been developed. The reaction relies on the use of inexpensive NiCl2·6H2O/dppf/Zn as the catalytic system and DMAP as the additive, allowing the cyanation to occur under mild reaction conditions (50–80 °C) with wide functional group tolerance. DMAP was found to be crucial for successful
已经开发了一种新的且一般的镍催化的杂(芳基)氯化物氰化方法,该方法使用毒性较小的Zn(CN)2作为氰化物源。该反应依赖于使用廉价的NiCl 2 ·6H 2 O / dppf / Zn作为催化体系,并使用DMAP作为添加剂,从而使氰化反应在温和的反应条件下(50–80°C)发生,且具有宽泛的官能团耐受性。发现DMAP对于成功转化至关重要,并且基于机理研究,该反应可能通过Ni(0)/ Ni(II)催化进行。该方法也成功地扩展到了芳基溴化物和芳基碘化物。
A General, Practical Palladium-Catalyzed Cyanation of (Hetero)Aryl Chlorides and Bromides
作者:Todd D. Senecal、Wei Shu、Stephen L. Buchwald
DOI:10.1002/anie.201304188
日期:2013.9.16
Playing it safe: The nontoxic cyanide source K4[Fe(CN)6]⋅3 H2O can be used for the cyanation of (hetero)aryl halides. The application of palladacycle catalysts prevents poisoning during catalyst formation, thereby allowing for low catalyst loadings, fast reaction times, and wide heterocyclic substrate scope.
安全操作:无毒氰化物源 K 4 [Fe(CN) 6 ]⋅3 H 2 O 可用于(杂)芳基卤化物的氰化。钯环催化剂的应用可防止催化剂形成过程中中毒,从而实现低催化剂负载、快速反应时间和广泛的杂环底物范围。
[EN] PHARMACEUTICAL COMPOUNDS FOR THE TREATMENT OF COMPLEMENT MEDIATED DISORDERS<br/>[FR] COMPOSÉS PHARMACEUTIQUES POUR LE TRAITEMENT DE TROUBLES À MÉDIATION PAR COMPLÉMENT
申请人:ACHILLION PHARMACEUTICALS INC
公开号:WO2022066774A1
公开(公告)日:2022-03-31
This disclosure provides pharmaceutical compounds to treat medical disorders, such as complement-mediated disorders, including complement C1-mediated disorders.
这份披露提供了用于治疗医学障碍的药物化合物,例如补体介导的障碍,包括补体C1介导的障碍。
Nickel-Catalyzed Cyanation of (Hetero)aryl Bromides Using DABAL-Me<sub>3</sub> as a Soluble Reductant
作者:Geraldo Duran-Camacho、J. Caleb Hethcox
DOI:10.1021/acs.orglett.2c03503
日期:2022.11.18
bis(trimethylaluminum)-1,4-diazabicyclo[2.2.2]octane (DABAL-Me3) as a soluble reductant has been developed. The reaction uses readily available and inexpensive Ni(dppf)Cl2 as a precatalyst, a substoichiometric amount of Zn(CN)2, and DABAL-Me3 as an alternative to commonly prescribed insoluble reductants. We found the addition of catalytic tetrabutylammonium bromide (TBABr) to be beneficial, due to facilitating dissolution