915712-34-4Relevant academic research and scientific papers
Multicomponent Approach to Hydantoins and Thiohydantoins Involving a Deep Eutectic Solvent
Kotha, Sambasivarao,Gupta, Naveen K.,Aswar, Vikas R.
, p. 3188 - 3197 (2019)
We report an efficient synthetic strategy to diverse hydantoins and thiohydantoins involving a three-component reaction with the aid of deep eutectic solvent. Here, N,N′-dimethyl urea and N,N′-dimethyl thiourea play a dual role as reactant and reaction medium along with l-(+)-tartaric acid. The three-component reaction provides an easy access to 5-amino-1,3-dialkyl-substituted hydantoins and thiohydantoins in good yields.
Tin powder-promoted oxidation/allylation of glycine esters: Synthesis of γ,δ-unsaturated α-amino acid esters
Zhao, Pengfei,Huang, Danfeng,Wang, Feng,Han, Tongyu,Yang, Ming,Wang, Ke-Hu,Hu, Yulai
, (2021/10/20)
An efficient tin powder-promoted oxidation/allylation reaction of glycine esters with allyl bromides is developed, which affords γ,δ-unsaturated α-amino acid esters under mild conditions without any other transition metal catalysts. This method avoids the use of unstable imine as starting material, and provides an efficient method for synthesis of γ,δ-unsaturated α-amino acid esters and α-methylene-γ-lactam derivatives. Additional supporting information may be found in the online version of this article at the publisher's web site.
Polarity-Reversed Addition of Enol Ethers to Imines under Visible Light: Redox-Neutral Access to Azide-Containing Amino Acids
Yang, Sen,Zhu, Shuangyu,Lu, Dengfu,Gong, Yuefa
supporting information, p. 8464 - 8468 (2019/10/14)
A three-component and polarity-reversed addition cascade with a glyoxylate-based imine, an enol ether, and TMSN3 was established for the construction of γ-azido amino acids under visible light. This transformation features mild and redox-neutra
Asymmetric Organocatalytic Synthesis of Bisindoles – Scope and Derivatizations
Retich, Christina,Br?se, Stefan
supporting information, p. 60 - 77 (2018/01/17)
Starting from 3-vinylindoles and glyoxolate imines, we created a library of diverse 4,6-bis(1H-indole-3-yl)piperidine 2-carboxylates by using 10 mol-% of a chiral phosphoric acid. Utilising electron-withdrawing groups on the starting material during the r
Synthesis of Dihydrophenanthridines and Oxoimidazolidines from Anilines and Ethylglyoxylate via Aza Diels-Alder Reaction of Arynes and KF-Induced Annulation
Reddy, R. Santhosh,Lagishetti, Chandraiah,Chen, Shuo,Kiran, I. N. Chaithanya,He, Yun
supporting information, p. 4546 - 4549 (2016/09/28)
The transition-metal-free multicomponent coupling of arynes, anilines, and ethylglyoxylate, proceeding via an inverse electron-demand aza Diels-Alder cycloaddition and N-arylation, has been demonstrated. This protocol allows rapid access to N-aryl dihydrophenanthridine derivatives in moderate to high yields at room temperature from readily available starting materials. In addition, an unprecedented fluoride induced annulation of ethyl(arylimino)acetates led to the formation of highly functionalized oxoimidazolidine derivatives in good yields under mild conditions.
Asymmetric organocatalytic synthesis of 4,6-bis(1H-indole-3-yl)-piperidine- 2 carboxylates
Zhong, Sabilla,Nieger, Martin,Bihlmeier, Angela,Shi, Min,Braese, Stefan
supporting information, p. 3265 - 3270 (2014/05/06)
We developed an asymmetric organocatalytic synthesis of 4,6-bis(1H-indole-3-yl)-piperidine-2-carboxylates using 10 mol% of a chiral phosphoric acid. The products, which are novel bisindole-piperidine-amino acid hybrids, can be obtained in one step from 3-
Indium-assisted aluminium-based stereoselective allylation of prostereogenic α,α-disubstituted cycloalkanones and imines
Reddy, Chennakesava,Babu, Srinivasarao Arulananda,Aslam, Nayyar Ahmad
, p. 40199 - 40213 (2014/12/10)
The use of a catalytic amount of InCl3in combination with Al0for the allylation of a variety of prostereogenic α,α-disubstituted (hindered) cycloalkanones, 1,2-dione-based systems and various imino systems (CN functional groups) is reported. The stereoselective InCl3-catalyzed Al-based allylation of various 2-substituted-2-carbethoxycycloalkanones gave the corresponding products with moderate to excellent diastereoselectivity. The allylation and propargylation of imines including α-imino esters using a catalytic amount of InCl3in combination with Al0gave the corresponding allylated and propargylated compounds in moderate to good yields. If γ-substituted allylic halides were added to imino compounds, low to very good diastereoselectivity was obtained. The allylation of chiral N-tert-butylsulfinyl imine systems gave the corresponding products in moderate yields with good to excellent diastereoselectivity. This journal is
Synthesis and biological evaluation of urea derivatives as highly potent and selective rho kinase inhibitors
Yin, Yan,Lin, Li,Ruiz, Claudia,Khan, Susan,Cameron, Michael D.,Grant, Wayne,Pocas, Jennifer,Eid, Nibal,Park, Hajeung,Schr?ter, Thomas,Lograsso, Philip V.,Feng, Yangbo
supporting information, p. 3568 - 3581 (2013/06/27)
RhoA and its downstream effector ROCK mediate stress fiber formation and cell contraction through their effects on the phosphorylation of myosin light chain (MLC). Inhibition of the RhoA/ROCK pathway has proven to be a promising strategy for several indications such as cardiovascular disease, glaucoma, and inflammatory disease. In 2010, our group reported urea-based ROCK inhibitors as potential antiglaucoma agents. These compounds showed potent IC50 values in enzymatic and cell-based assays and significant intraocular pressure (IOP)-lowering effects in rats (~7 mmHg).(22) To develop more advanced ROCK inhibitors targeting various potential applications (such as myocardial infarction, erectile dysfunction, multiple sclerosis, etc.) in addition to glaucoma, a thorough SAR for this urea-based scaffold was studied. The detailed optimization process, counter-screening, and in vitro and in vivo DMPK studies are discussed. Potent and selective ROCK inhibitors with various in vivo pharmacokinetic properties were discovered.
Ruthenium(II)-catalyzed regioselective reductive coupling of α-imino esters with dienes
Zhu, Shujie,Lu, Xiaoxia,Luo, Yueting,Zhang, Wei,Jiang, Huanfeng,Yan, Ming,Zeng, Wei
supporting information, p. 1440 - 1443 (2013/06/27)
A method for the highly regioselective reductive coupling reaction of N-aryl-α-imino esters with dienes is described. The method utilizes the RuHCl(CO)(PPh3)3/iPrOH catalytic system under an Ar atmosphere and provides α-branched allylic α-amino acid derivatives. Application of this transformation to the concise synthesis of a natural plant growth regulator is demonstrated.
Palladium(II)-catalyzed enantioselective arylation of α-imino esters
Chen, Jiayan,Lu, Xiaoxia,Lou, Wenyong,Ye, Yong,Jiang, Huanfeng,Zeng, Wei
, p. 8541 - 8548 (2012/11/13)
A protocol for Pd(II)-catalyzed asymmetric arylation of N-aryl imino esters has been developed. The method affords a practical and direct access to chiral arylglycine derivatives in good yields and with high enantioselectivities.
