203866-16-4Relevant articles and documents
Synthesis, Ni(II) Schiff base complexation and structural analysis of fluorinated analogs of the ligand (S)-2-[N-(N′-benzylprolyl)amino]benzophenone (BPB)
Tatum, Natalie J.,Yufit, Dmitry S.,Cobb, Steven L.,Coxon, Christopher R.
, p. 77 - 83 (2015)
Herein we report the first X-ray crystal structure of the well-known (S)-l-ala-Ni-BPB complex (1) and compare this with the X-ray crystal structures obtained for two novel fluorinated (S)-l-ala-Ni-BPB complexes (8 and 12) that contain either an S- or R-fluorine atom on the proline ring of the BPB ligand. The preparation of complexes 8 and 12 has been enabled by the synthesis of two new fluorinated BPB ligands (7 and 11). In this work we looked to observe the structural effects that the introduction of a single fluorine atom had on the known complex 1. Arising from this, we highlight a novel fluorine-nickel interaction that on the basis of DFT calculations appears to provide additional stabilization to one of the complexes prepared ((S)-l-ala-Ni-BPB complex 8).
Novel Tricyclic Pyroglutamide Derivatives as Potent RORγt Inverse Agonists Identified using a Virtual Screening Approach
Liu, Qingjie,Batt, Douglas G.,Weigelt, Carolyn A.,Yip, Shiuhang,Wu, Dauh-Rurng,Ruzanov, Max,Sack, John S.,Wang, Jinhong,Yarde, Melissa,Li, Sha,Shuster, David J.,Xie, Jenny H.,Sherry, Tara,Obermeier, Mary T.,Fura, Aberra,Stefanski, Kevin,Cornelius, Georgia,Khandelwal, Purnima,Tino, Joseph A.,Macor, John E.,Salter-Cid, Luisa,Denton, Rex,Zhao, Qihong,Dhar, T. G. Murali
supporting information, p. 2510 - 2518 (2020/12/03)
Employing a virtual screening approach, we identified the pyroglutamide moiety as a nonacid replacement for the cyclohexanecarboxylic acid group which, when coupled to our previously reported conformationally locked tricyclic core, provided potent and selective RORγt inverse agonists. Structure-activity relationship optimization of the pyroglutamide moiety led to the identification of compound 18 as a potent and selective RORγt inverse agonist, albeit with poor aqueous solubility. We took advantage of the tertiary carbinol group in 18 to synthesize a phosphate prodrug, which provided good solubility, excellent exposures in mouse PK studies, and significant efficacy in a mouse model of psoriasis.
Rapid Deoxyfluorination of Alcohols with N-Tosyl-4-chlorobenzenesulfonimidoyl Fluoride (SulfoxFluor) at Room Temperature
Guo, Junkai,Kuang, Cuiwen,Rong, Jian,Li, Lingchun,Ni, Chuanfa,Hu, Jinbo
supporting information, p. 7259 - 7264 (2019/05/10)
The deoxyfluorination of alcohols is a fundamentally important approach to access alkyl fluorides, and thus the development of shelf-stable, easy-to-handle, fluorine-economical, and highly selective deoxyfluorination reagents is highly desired. This work describes the development of a crystalline compound, N-tosyl-4-chlorobenzenesulfonimidoyl fluoride (SulfoxFluor), as a novel deoxyfluorination reagent that possesses all of the aforementioned merits, which is rare in the arena of deoxyfluorination. Endowed by the multi-dimensional modulating ability of the sulfonimidoyl group, SulfoxFluor is superior to 2-pyridinesulfonyl fluoride (PyFluor) in fluorination rate, and is also superior to perfluorobutanesulfonyl fluoride (PBSF) in fluorine-economy. Its reaction with alcohols not only tolerates a wide range of functionalities including the more sterically hindered alcoholic hydroxyl groups, but also exhibits high fluorination/elimination selectivity. Because SulfoxFluor can be easily prepared from inexpensive materials and can be safely handled without special techniques, it promises to serve as a practical deoxyfluorination reagent for the synthesis of various alkyl fluorides.