4-Substituted thiophene- and furan-2-sulfonamides as topical carbonic anhydrase inhibitors
摘要:
A series of 4-substituted thiophene- and furan-2-sulfonamides was prepared and was found to possess nanomolar-level potency for inhibition of human carbonic anhydrase II in vitro. Selected examples from this group were further evaluated for their potential to act as topically effective ocular hypotensive agents in the ocular normotensive albino rabbit and the ocular alpha-chymotrypsinized rabbit. Solubility studies in water and pH 7.4 buffer were carried out to estimate the ability of compounds to be formulated in solution. The sensitization potential of key representative structures was determined by in vitro glutathione reactivity studies and guinea pig maximization testing.
MeZnOMe-mediated reaction of aldehydes with Grignard reagents: A glance into nucleophilic addition/Oppenauer oxidation pathway
作者:Ying Fu、Xian-Zhen Ma、Chun-Zhao Shi、Tong Shen、Zhengyin Du
DOI:10.1002/aoc.4462
日期:2018.9
A novel organozincate of RMgX ⋅MeZnOMe ⋅LiCl type, formed in situ via transmetalation of Grignard reagent RMgBr ⋅LiCl with MeZnOMe, is shown to be an excellent organometallic species in the nucleophilic addition/Oppenauer oxidation of aldehydes to generate aromatic ketones in high yield. This transformation allows quick access to structurally diverse aryl, heteroaryl, benzyl and alkyl ketones with
Efficient, recyclable and phosphine-free carbonylative Suzuki coupling reaction using immobilized palladium ion-containing ionic liquid: synthesis of aryl ketones and heteroaryl ketones
作者:Mayur V. Khedkar、Takehiko Sasaki、Bhalchandra M. Bhanage
DOI:10.1039/c3ra40730f
日期:——
The carbonylativeSuzukicouplingreaction of aryl and heteroaryliodides was studied by using immobilized palladium ion-containing ionic liquid (ImmPd-IL). The protocol was optimized with respect to various reaction parameters, applied to a wide variety of substituted aryl/heteroaryliodides and various aryl/heteroaryl boronic acids with different steric and electronic properties, and afforded the
Ligand‐free Palladium‐Catalyzed Carbonylative Suzuki Coupling of Aryl Iodides in Aqueous CH
<sub>3</sub>
CN with Sub‐stoichiometric Amount of Mo(CO)
<sub>6</sub>
as CO Source
作者:Nan Sun、Qingxia Sun、Wei Zhao、Liqun Jin、Baoxiang Hu、Zhenlu Shen、Xinquan Hu
DOI:10.1002/adsc.201900011
日期:2019.4.23
established based on the palladium‐catalyzed carbonylative Suzuki coupling approach with sub‐stoichiometric Mo(CO)6 as CO source. Using 0.5 mol% of Pd(TFA)2 as catalyst, 0.5 equivalent of Mo(CO)6 as solid carbonyl reagent and 3 equivalent of K3PO4 as base, a wide range of functionalized (hetero)aryl iodides and (hetero)aryl boronic acids could smoothly proceed the carbonylative cross‐coupling reaction in aqueous
基于亚化学计量的Mo(CO)6作为CO源的钯催化羰基化Suzuki偶联方法,已经建立了一种合成二芳基和杂二芳基酮的新方法。使用0.5摩尔%的Pd(TFA)2作为催化剂,0.5当量的Mo(CO)6作为固体羰基试剂和3当量的K 3 PO 4作为碱,各种官能化的(杂)芳基碘和(杂)芳基硼酸可以在50°C的CH 3 CN水溶液中平稳地进行羰基交叉偶联反应,从而提供相应的酮,收率非常好。新开发的方法易于在温和条件下高效地操作。
Transition metal-free Suzuki type cross-coupling reaction for the synthesis of dissymmetric ketones
A simple, efficient and metal-free route for the synthesis of dissymmetric ketones through Suzuki type cross-coupling reaction has been established. This strategy signifies an attractive, cost-effective and operationally convenient tool for the synthesis of a wide range of dissymmetric ketones. Although conventional routes for the synthesis of ketones have been widely used, the potential challenge
Tandem nucleophilic addition–Oppenauer oxidation of aromatic aldehydes to aryl ketones with triorganoaluminium reagents
作者:Ying Fu、Yanshou Yang、Helmut M. Hügel、Zhengyin Du、Kehu Wang、Danfeng Huang、Yulai Hu
DOI:10.1039/c3ob40642c
日期:——
In the presence of pinacolone, the in situ prepared triorganoaluminium reagents reacted with aromatic aldehydes to give ketones in moderate to high yield. We propose that the products are formed via a tandem organoaluminium reagents addition–Oppenauer oxidation sequence.