3313-84-6Relevant academic research and scientific papers
Development of succinimide-based inhibitors for the mitochondrial rhomboid protease PARL
Andrews, Charlotte L.,Cardozo, Joaquin M.,Chow, Alyssa S.,Crainic, Jennifer A.,Parsons, William H.,Rutland, Nicholas T.,Sheehan, Brendan K.
supporting information, (2021/08/04)
While the biochemistry of rhomboid proteases has been extensively studied since their discovery two decades ago, efforts to define the physiological roles of these enzymes are ongoing and would benefit from chemical probes that can be used to manipulate the functions of these proteins in their native settings. Here, we describe the use of activity-based protein profiling (ABPP) technology to conduct a targeted screen for small-molecule inhibitors of the mitochondrial rhomboid protease PARL, which plays a critical role in regulating mitophagy and cell death. We synthesized a series of succinimide-containing sulfonyl esters and sulfonamides and discovered that these compounds serve as inhibitors of PARL with the most potent sulfonamides having submicromolar affinity for the enzyme. A counterscreen against the bacterial rhomboid protease GlpG demonstrates that several of these compounds display selectivity for PARL over GlpG by as much as two orders of magnitude. Both the sulfonyl ester and sulfonamide scaffolds exhibit reversible binding and are able to engage PARL in mammalian cells. Collectively, our findings provide encouraging precedent for the development of PARL-selective inhibitors and establish N-[(arylsulfonyl)oxy]succinimides and N-arylsulfonylsuccinimides as new molecular scaffolds for inhibiting members of the rhomboid protease family.
Electrochemical cross-coupling reactions of sodium arenesulfinates with thiophenols and phenols
Ma, Jinfeng,Xu, Pan,Zhong, Zijian,Zhou, Aihua
supporting information, (2021/10/26)
A green electrochemical oxidative cross-coupling protocol for the generation of thiosulfonates and sulfonate esters using sodium arenesulfinates and thiophenols/phenols is disclosed. The protocol involves using inorganic and non-toxic NaI as both redox catalyst and supporting electrolyte at room temperature without oxidant and base. The reactions provide good yields of products and tolerate broad substrate scope. The mechanistic studies revealed that the reactions proceed via a radical pathway for the formation of SO2–S and SO2–O bonds.
Practical Electro-Oxidative Sulfonylation of Phenols with Sodium Arenesulfinates Generating Arylsulfonate Esters
Tian, Zhibin,Gong, Qihang,Huang, Tianzeng,Liu, Long,Chen, Tieqiao
, p. 15914 - 15926 (2021/05/04)
A practical and sustainable synthesis of arylsulfonate esters has been developed through electro-oxidation. This reaction employed the stable and readily available phenols and sodium arenesulfinates as the starting materials and took place under mild reaction conditions without additional oxidants. A wide range of arylsulfonate esters including those bearing functional groups were produced in good to excellent yields. This reaction could also be conducted at a gram scale without a decrease of reaction efficiency. Those results well demonstrated the potential synthetic value of this reaction in organic synthesis.
NFSI/KF mediated mild and chemoselective interconversion of aryl TBDMS ethers to their benzene sulfonate
Dond, Bharat D.,Thore, Shivaji N.
, (2020/02/06)
A one pot protocol for the transformation of aryl TBDMS ethers to corresponding benzene sulfonate esters using NFSI (N-flurobenzenesulfonimide)/KF is described. In situ generation of benzenesulfonyl fluoride directs chemoselective cleavage of aryl silyl ethers over alkyl silyl ethers. Electron withdrawing substituent's on aryl ring provided better yield than donating groups. Protecting groups and sensitive functionalities are well tolerated in this methodology. Thus, commercially available inexpensive reagents, mild reaction conditions and step economy are the advantages of this method.
Deprotection of durable benzenesulfonyl protection for phenols — efficient synthesis of polyphenols
Alam, Mohammad Shariful,Koo, Sangho
supporting information, p. 247 - 254 (2018/01/08)
A robust protection method for phenol was demonstrated by the use of durable benzenesulfonyl group, which survives various harsh reaction conditions using Grignard reagent, organolithium reagent, metal alkoxide, phosgene, mineral, and Lewis acids. A facile deprotection condition utilizing pulverized KOH (5 equiv) and t-BuOH (10 equiv) in hot toluene makes this protocol as a practical method, which can be applied to the multistep synthesis of biologically and medicinally important polyphenol compounds.
Kinetic and computational evidence for an intermediate in the hydrolysis of sulfonate esters
Babtie, Ann C.,Lima, Marcelo F.,Hollfelder, Florian,Kirby, Anthony J.
, p. 8095 - 8101,7 (2012/12/11)
The hydrolytic reactions of sulfonate esters have previously been considered to occur by concerted mechanisms. We now report the observation of a break in a Bronsted correlation for the alkaline hydrolysis of aryl benzenesulfonates. On either side of a break-point, β leaving group values of -0.27 (pKa a > 8.5) are measured. These data are consistent with a two-step mechanism involving a pentavalent intermediate that is also supported by QM/MM calculations. The emerging scenario can be explained by the combined effect of a strong nucleophile with a poor leaving group that compel a usually concerted reaction to favour a stepwise process.
ALPHA-CARBOLINES AS CDK-1 INHIBITORS
-
Page/Page column 67-68, (2010/11/25)
The present invention embraces compounds of the general formula (I) in which R2 to R5 and X are as defined in Claim 1, these compounds being suitable for treating diseases characterized by excessive or abnormal cell proliferation, and also embraces their use for producing a medicinal product having the aforementioned properties.
Competitive Reaction Pathways in the Nucleophilic Substitution Reactions of Aryl Benzenesulfonates with Benzylamines in Acetonitrile
Choi, Jin Heui,Lee, Byung Choon,Lee, Hai Whang,Lee, Ikchoon
, p. 1277 - 1281 (2007/10/03)
The reactions of aryl benzenesulfonates (YC6H4SO2OC6H4Z) with benzylamines (XC6H4CH2NH2) in acetonitrile at 65.0 deg C have been studied. The reactons proceed competitevely by S-O (kS-O) and C-O (kC-O) bond scission, but the former provides the major reaction pathway. On the basis of analysis of the Hammet and Broensted coefficients together with the cross-interaction constants ρXY, ρYZ, and ρXZ, stepwise mechanisms are proposed in which the S-O bond cleavage proceeds by rate-limiting formation of a trigonal-bipyramidal pentacoordinate (TBP-5C) intermediate, whereas the C-O bond scission takes place by rate-limiting expulsion of the sulfonate anion (YC6H4SO3-) from a Meisenheimer-type complex.
Solvent Independent Transition-state Structures. Part III. Sulfonyl Transfer Reactions
Tarkka, Richard M.,Park, William K. C.,Liu, Ping,Buncel, Erwin,Hoz, Shmaryahu
, p. 2439 - 2444 (2007/10/02)
A kinetic spectrophotometric study has been performed on the reactions of p-nitrophenyl benzenesulfonate (PNPBS) with m-chlorophenoxide, p-chlorophenoxide, phenoxide, p-methylphenoxide and p-methoxyphenoxide ions in DMSO-H2O mixtures at 25.0 deg C.Systema
