111771-13-2Relevant academic research and scientific papers
Synthesis of Methoxy-, Methylenedioxy-, Hydroxy-, and Halo-Substituted Benzophenanthridinone Derivatives as DNA Topoisomerase IB (TOP1) and Tyrosyl-DNA Phosphodiesterase 1 (TDP1) Inhibitors and Their Biological Activity for Drug-Resistant Cancer
Hu, De-Xuan,Tang, Wen-Lin,Zhang, Yu,Yang, Hao,Wang, Wenjie,Agama, Keli,Pommier, Yves,An, Lin-Kun
, p. 7617 - 7629 (2021/06/25)
As a recently discovered DNA repair enzyme, tyrosyl-DNA phosphodiesterase 1 (TDP1) removes topoisomerase IB (TOP1)-mediated DNA protein cross-links. Inhibiting TDP1 can potentiate the cytotoxicity of TOP1 inhibitors and overcome cancer cell resistance to
Enantioconvergent Cu-catalyzed intramolecular C-C coupling at boron-bound C(sp3) atoms of α-aminoalkylboronates using a C1-symmetrical 2,2′-bipyridyl ligand attached to a helically chiral macromolecular scaffold
Yoshinaga, Yukako,Yamamoto, Takeshi,Suginome, Michinori
supporting information, p. 18317 - 18323 (2020/11/17)
Enantioconvergent intramolecular coupling of α-(2-bromobenzoylamino)benzylboronic esters was achieved using a copper catalyst having helically chiral macromolecular bipyridyl ligand, PQXbpy. Racemic α-(2-bromobenzoylamino)benzylboronic esters were converted into (R)-configured 3-arylisoindolinones with high enantiopurity using right-handed helical PQXbpy as a chiral ligand in a toluene/CHCl3 mixed solvent. When enantiopure (R)- and (S)-configured boronates were separately reacted under the same reaction conditions, both afforded (R)-configured products through formal stereoinvertive and stereoretentive processes, respectively. From these results, a mechanism involving deracemization of organocopper intermediates in the presence of PQXbpy is assumed. PQXbpy switched its helical sense to left-handed when a toluene/1,1,2-trichloroethane mixed solvent was used, resulting in the formation of the corresponding (S)-products from the racemic starting material.
Synthesis Development of the Selective Estrogen Receptor Degrader (SERD) LSZ102 from a Suzuki Coupling to a C-H Activation Strategy
Baenziger, Markus,Baierl, Marcel,Devanathan, Krishnaswamy,Eswaran, Sumesh,Fu, Peng,Gschwend, Bjoern,Haller, Michael,Kasinathan, Gopu,Kovacic, Nikola,Langlois, Audrey,Li, Yongfeng,Schuerch, Friedrich,Shen, Xiaodong,Wan, Yinbo,Wickendick, Regina,Xie, Siwei,Zhang, Kai
supporting information, p. 1405 - 1419 (2020/10/12)
The development of the synthetic process to the selective estrogen receptor degrader (SERD) drug candidate LSZ102 from the medicinal chemistry synthesis to the streamlined large-scale manufacturing route is described. The synthesis of LSZ102 could be sign
Palladium-Catalyzed Stereoselective Aza-Wacker-Heck Cyclization: One-Pot Stepwise Strategy toward Tetracyclic Fused Heterocycles
Chen, Li-Yuan,Chuang, Ta-Hsien,Lai, Chin-Hung,Tang, Rong-Shiow
supporting information, p. 9337 - 9341 (2020/12/21)
Palladium-catalyzed intramolecular tandem cyclization reactions were conducted for the synthesis of densely cis/cis-fused aza-tetracyclic structures. The process involved a palladium(II)-catalyzed aerobic aza-Wacker reaction, followed by a palladium(0)-catalyzed Heck reaction. The effects of the solvent and benzene substitution pattern on the one-pot, two-step cascade reaction were studied systematically, and a probable mechanism was proposed. Strained pentahydrobenzo[f]cyclopenta[hi]indolizin-6-one and racemic γ-lycorane can also be synthesized rapidly using this palladium-catalyzed aza-Wacker-Heck cyclization reaction.
Utilization of BozPhos as an Effective Ligand in Enantioselective C-H Functionalization of Cyclopropanes: Synthesis of Dihydroisoquinolones and Dihydroquinolones
Mayer, Camilla,Ladd, Carolyn L.,Charette, André B.
supporting information, p. 2639 - 2644 (2019/04/17)
The bisphosphine monoxide (R,R)-BozPhos enables enantioselective C-H functionalization of cyclopropanes in a palladium-catalyzed cyclization. The synthesis of a broad spectrum of dihydroisoquinolones and dihydroquinolones in good yields and high enantiomeric excess was achieved through the use of this hemilabile ligand. Furthermore, the isolation of an intermediary palladium(II)-BozPhos complex after oxidative addition was successful and a second complex provided further insight into bond length and angles through a crystal structure.
Copper-Catalyzed Cascade Synthesis of [1,2,4]-Triazoloquinazolinones
Lou, Zhenbang,Man, Ningning,Yang, Haijun,Zhu, Changjin,Fu, Hua
supporting information, p. 1395 - 1399 (2018/05/03)
An efficient and practical method for the synthesis of 1,2,4-triazolo[5,1- b ]quinazolin-9(3 H)-ones has been developed via the copper-catalyzed domino reactions of readily available substituted N ′-acetyl-2-bromobenzohydrazides with cyanamide. The protocol uses inexpensive CuI as the catalyst, and no other ligand or additive was required. The target products were prepared in good to excellent yields with tolerance of various functional groups.
CF3-substituted mollugin 2-(4-morpholinyl)-ethyl ester as a potential anti-inflammatory agent with improved aqueous solubility and metabolic stability
Hong, Ki Bum,Kim, Darong,Kim, Bo-Kyung,Woo, Seo Yeon,Lee, Ji Hoon,Han, Seung-Hee,Bae, Gyu-Un,Kang, Soosung
, (2018/09/26)
Although mollugin, the main ingredient of the oriental medicinal herb Rubia cordifolia, has considerable anti-inflammatory effects, it has poor aqueous solubility as well as poor metabolic and plasma stability. To overcome these shortfalls, various mollug
Palladium-Catalyzed Enantioselective Intramolecular Dearomative Heck Reaction
Li, Xiang,Zhou, Bo,Yang, Run-Ze,Yang, Fu-Ming,Liang, Ren-Xiao,Liu, Ren-Rong,Jia, Yi-Xia
supporting information, p. 13945 - 13951 (2018/10/20)
Enantioselective intramolecular dearomative Heck reactions have been developed by Pd-catalyzed cross-coupling of aryl halides or aryl triflates with the internal C=C bond of indoles, benzofurans, pyrroles, and furans. A variety of structurally unique spir
Synthesis and biological evaluation of negative allosteric modulators of the Kv11.1(hERG) channel
Yu, Zhiyi,Van Veldhoven, Jacobus P.D.,'T Hart, Ingrid M.E.,Kopf, Adrian H.,Heitman, Laura H.,Ijzerman, Adriaan P.
supporting information, p. 50 - 59 (2015/11/23)
We synthesized and evaluated a series of compounds for their allosteric modulation at the Kv11.1 (hERG) channel. Most compounds were negative allosteric modulators of [3H]dofetilide binding to the channel, in particular 7f, 7h-j and 7p. Compounds 7f and 7p were the most potent negative allosteric modulators amongst all ligands, significantly increasing the dissociation rate of dofetilide in the radioligand kinetic binding assay, while remarkably reducing the affinities of dofetilide and astemizole in a competitive displacement assay. Additionally, both 7f and 7p displayed peculiar displacement characteristics with Hill coefficients significantly distinct from unity as shown by e.g., dofetilide, further indicative of their allosteric effects on dofetilide binding. Our findings in this investigation yielded several promising negative allosteric modulators for future functional and clinical research with respect to their antiarrhythmic propensities, either alone or in combination with known Kv11.1 blockers.
Enantioselective synthesis of planar chiral ferrocenes via Pd(0)-catalyzed intramolecular direct C-H bond arylation
Gao, De-Wei,Yin, Qin,Gu, Qing,You, Shu-Li
supporting information, p. 4841 - 4844 (2014/04/17)
A highly efficient synthesis of planar chiral ferrocenes by enantioselective Pd(0)-catalyzed direct C-H arylation from readily available starting materials under mild reaction conditions was developed (up to 99% yield, 99% ee). The products can be easily transformed to the highly efficient planar ferrocene ligands, which have demonstrated high efficiency in Pd-catalyzed asymmetric allylic alkylation and amination reactions.
