Month: April 2022

Application of 1219741-50-0. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: 6-Bromo-3-methyl-1H-indole, is researched, Molecular C9H8BrN, CAS is 1219741-50-0, about Chiral Diphosphine-Palladium-Catalyzed Sequential Asymmetric Double-Friedel-Crafts Alkylation and N-Hemiketalization for Spiro-polycyclic Indole Derivatives. Author is Li, Nai-Kai; Zhang, Jun-Qi; Sun, Bing-Bing; Li, Hai-Yan; Wang, Xing-Wang.

An efficient cascade asym. Friedel-Crafts alkylation/N-hemiketalization/Friedel-Crafts alkylation reaction of 3-alkylindoles with oxindolyl β,γ-unsaturated α-ketoesters has been developed in the presence of a chiral diphosphine-palladium(II) catalyst. A series of enantiomerically enriched spiro-polycyclic indole derivatives, e.g. I, have been constructed in high yields with excellent enantioselectivities and diastereoselectivities.

There is still a lot of research devoted to this compound(SMILES：CC1=CNC2=C1C=CC(Br)=C2)Application of 1219741-50-0, and with the development of science, more effects of this compound(1219741-50-0) can be discovered.

Reference:
Bromide – Wikipedia,
bromide – Wiktionary

In general, if the atoms that make up the ring contain heteroatoms, such rings become heterocycles, and organic compounds containing heterocycles are called heterocyclic compounds. An article called Pyro-Borates, Spiro-Borates, and Boroxinates of BINOL-Assembly, Structures, and Reactivity, published in 2017-08-02, which mentions a compound: 119707-74-3, Name is (S)-3,3′-Dibromo-1,1′-bi-2-naphthol, Molecular C20H12Br2O2, Safety of (S)-3,3′-Dibromo-1,1′-bi-2-naphthol.

VANOL and VAPOL ligands are known to react with three equivalent of B(OPh)3 to form a catalytic species that contains a boroxinate core with three boron atoms, and these have proven to be effective catalysts for a number of reactions. However, it was not known whether the closely related BINOL ligand will likewise form a boroxinate species. It had simply been observed that mixtures of BINOL and B(OPh)3 were very poor catalysts compared to the same mixtures with VANOL or VAPOL. Borate esters of BINOL have been investigated as chiral catalysts, and these include meso-borates, spiro-borates, and diborabicyclo-borate esters. Borate esters are often in equilibrium, and their structures can be determined by stoichiometry and/or thermodn., especially in the presence of a base. The present study examines the structures of borate esters of BINOL that are produced with different stoichiometric combinations of BINOL with B(OPh)3 in the presence and absence of a base. Depending on conditions, pyro-borates, spiro-borates, and boroxinate species can be generated and their effectiveness in a catalytic asym. aziridination was evaluated. The finding is that BINOL borate species are not necessarily inferior catalysts to those of VANOL and VAPOL but that, under the conditions, BINOL forms two different catalytic species (a boroxinate and a spiro-borate) that give opposite asym. inductions. However, many BINOL derivatives with substituents in the 3- and 3′-positions gave only the boroxinate species and the 3,3′-Ph2BINOL ligand gave a boroxinate catalyst that gives excellent inductions in the aziridination reaction. BINOL derivatives with larger groups in the 3,3′-position will not form either spiro-borates or boroxinate species and thus are not effective catalysts at all.

There is still a lot of research devoted to this compound(SMILES：OC1=C(Br)C=C2C=CC=CC2=C1C3=C4C=CC=CC4=CC(Br)=C3O)Safety of (S)-3,3′-Dibromo-1,1′-bi-2-naphthol, and with the development of science, more effects of this compound(119707-74-3) can be discovered.

Reference:
Bromide – Wikipedia,
bromide – Wiktionary

Quality Control of 7-Chloro-4-(piperazin-1-yl)quinoline. So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic. Compound: 7-Chloro-4-(piperazin-1-yl)quinoline, is researched, Molecular C13H14ClN3, CAS is 837-52-5, about N-Propargylated isatin-Mannich mono- and bis-adducts: Synthesis and preliminary analysis of in vitro activity against Tritrichomonas foetus.

Cu(I)Cl promoted synthesis of N-propargylated-isatin Mannich mono- and bis-adducts, e.g. I [R = H, Me, Cl, etc.] with an extension towards the synthesis of N-propargylated-isatin-7-chloroquinoline conjugates was described. The synthesized scaffolds were evaluated for their in vitro activity against the veterinary protozoal pathogen Tritrichomonas fetus and cytotoxicity against human prostate cancer cell line. The preliminary evaluation data revealed the enhancement in the activity profiles with the introduction of 7-chloroquinoline ring with the most active conjugates I [R = H, Cl, Me] exhibiting IC50 of 22.2, 11.3 and 24.5 μM resp. against T. fetus and minimal toxicity against human prostate cell lines.

There is still a lot of research devoted to this compound(SMILES：C1=C(Cl)C=C2C(=C1)C(=CC=N2)N3CCNCC3)Quality Control of 7-Chloro-4-(piperazin-1-yl)quinoline, and with the development of science, more effects of this compound(837-52-5) can be discovered.

Reference:
Bromide – Wikipedia,
bromide – Wiktionary

Application In Synthesis of (S)-3,3′-Dibromo-1,1′-bi-2-naphthol. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: (S)-3,3′-Dibromo-1,1′-bi-2-naphthol, is researched, Molecular C20H12Br2O2, CAS is 119707-74-3, about Divergent synthesis of chiral heterocycles via sequencing of enantioselective three-component reactions and one-pot subsequent cyclization reactions. Author is Tang, Min; Xing, Dong; Huang, Haoxi; Hu, Wenhao.

A highly efficient sequencing of catalytic asym. three-component reactions of alcs., diazo compounds and aldimines/aldehydes with one-pot subsequent cyclization reactions was reported. The development of a robust and versatile Rh(II)/Zr(IV)-BINOL co-catalytic system not only gives high diastereo- and enantioselective controls of the three-component reaction, but also shows excellent functionality tolerances that allow a wide range of functionalities to be pre-installed in each component and readily undergo one-pot subsequent cyclization reactions, thus providing rapid and diversity-oriented synthesis (DOS) of different types of chiral nitrogen- and/or oxygen-containing polyfunctional heterocycles, I, II, III and IV.

There is still a lot of research devoted to this compound(SMILES：OC1=C(Br)C=C2C=CC=CC2=C1C3=C4C=CC=CC4=CC(Br)=C3O)Application In Synthesis of (S)-3,3′-Dibromo-1,1′-bi-2-naphthol, and with the development of science, more effects of this compound(119707-74-3) can be discovered.

Reference:
Bromide – Wikipedia,
bromide – Wiktionary