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Related Products of 36620-11-8. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: Bis(norbornadiene)rhodium (I) tetrafluoroborate, is researched, Molecular C14H8BF4Rh, CAS is 36620-11-8, about A Computational Study of Asymmetric Hydrogenation of 2-Phenyl Acrylic Acids Catalyzed by a Rh(I) Catalyst with Ferrocenyl Chiral Bisphosphorus Ligand: The Role of Ion-Pair Interaction. Author is Fan, Xiangru; Zheng, Lini; Yang, Yuhong; Dong, Xiu-Qin; Zhang, Xumu; Chung, Lung Wa.

Asym. hydrogenation reaction is one of the most efficient synthetic methods to form useful chiral compounds for synthetic chem., medicinal chem. and material chem. Generally, the enantioselectivity of many hydrogenation reactions is controlled by steric hindrance between the chiral ligand and substrate. Recently, Zhang group developed a highly asym. hydrogenation of 2-aryl and 2-alkyl acrylic acids catalyzed by a Rh(I) catalyst with a chiral Wudaphos ligand. The excellent enantioselectivity of this asym. reaction was proposed to be controlled by ion-pair interaction between the substrate and chiral ligand. In this study, a systematic d. functional theory study has been carried out to investigate the reaction mechanism and origin of the enantioselectivity. Our computational results suggest that this reaction follows the classic mechanism involving oxidative addition of H2, migratory insertion and reductive elimination. Different from the C=C coordination to the metal in the common oxidative addition step, our study found that the chelation of the carboxyl group of the substrate to the cationic Rh(I) metal is more favorable in this oxidative addition step. The high enantioselectivity is proposed to be dictated by a better catalyst/substrate geometric complementarity in the major pathway to have less distortion of the catalyst for a strong ion-pair interaction.

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The three-dimensional configuration of the ester heterocycle is basically the same as that of the carbocycle. Compound: Bis(norbornadiene)rhodium (I) tetrafluoroborate(SMILESS: [F-][B+3]([F-])([F-])[F-].C12=C3[Rh+]14567(C8=C5C9C6=C7C8C9)C%10=C4C2CC3%10,cas:36620-11-8) is researched.Name: 2-(Thiophen-3-yl)-1,3-dioxolane. The article 《Rh-Catalyzed Asymmetric Hydrogenation of Unsaturated Medium-Ring NH Lactams: Highly Enantioselective Synthesis of N-Unprotected 2,3-Dihydro-1,5-benzothiazepinones》 in relation to this compound, is published in Organic Letters. Let’s take a look at the latest research on this compound (cas:36620-11-8).

A straightforward method to prepare 1,5-benzothiazepines was reported. Catalyzed by a Rh/Zhaophos complex, unsaturated cyclic NH lactams with a medium-size ring were hydrogenated smoothly, giving remarkably high enantioselectivities. The sulfur atom in the substrates did not bring an inhibition which was observed with com. available bisphosphine ligands. This method was successfully applied in the scale-up synthesis of (R)-(-)-thiazesim.

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Heterocyclic compounds can be divided into two categories: alicyclic heterocycles and aromatic heterocycles. Compounds whose heterocycles in the molecular skeleton cannot reflect aromaticity are called alicyclic heterocyclic compounds. Compound: 36620-11-8, is researched, Molecular C14H8BF4Rh, about Ligand-Controlled Regiodivergent Enantioselective Rhodium-Catalyzed Alkene Hydroboration, the main research direction is ligand controlled regiodivergent enantioselective rhodium catalyzed alkene hydroboration; chiral alc enantioselective preparation; boronate chiral preparation oxidation; asymmetric catalysis; homogeneous catalysis; hydroboration; regiodivergent reactions; rhodium.Name: Bis(norbornadiene)rhodium (I) tetrafluoroborate.

Regiocontrol in the Rh-catalyzed boration of vinyl arenes is typically dominated by the presence of the conjugated aryl substituent. However, small differences in TADDOL-derived chiral monophosphite ligands can override this effect and direct Rh-catalyzed hydroboration of β-aryl and β-heteroaryl methylidenes by pinacolborane to selectively produce either chiral primary or tertiary borated products. The regiodivergent behavior is coupled with enantiodivergent addition of the borane. The nature of the TADDOL backbone substituents and that of the phosphite moiety function synergistically to direct the sense and extent of regioselectivity and enantioinduction. Twenty substrates undergo each reaction mode with regioselectivity values reaching >20:1 and enantiomer ratios reaching up to 98:2. A variety of subsequent transformations illustrate the potential utility of each product.

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Moritz, Jan-Ole; Chakrabortty, Soumyadeep; Mueller, Bernd H.; Spannenberg, Anke; Kamer, Paul C. J. published an article about the compound: Bis(norbornadiene)rhodium (I) tetrafluoroborate( cas:36620-11-8,SMILESS:[F-][B+3]([F-])([F-])[F-].C12=C3[Rh+]14567(C8=C5C9C6=C7C8C9)C%10=C4C2CC3%10 ).Related Products of 36620-11-8. Aromatic heterocyclic compounds can be classified according to the number of heteroatoms or the size of the ring. The authors also want to convey more information about this compound (cas:36620-11-8) through the article.

A convenient synthesis of enantiopure P-chirogenic diphosphazanes incorporating bulky bisphenol and 1,1′-bi-2-naphthol-derived substituents via the functionalization of a readily accessible enantiopure lithium phosphinoamide with chlorophosphoridites was developed. Since the product requires no subsequent deprotection, the protocol provides an easy, convenient synthesis of P-chirogenic ligands on the gram scale. The ligands were applied in the Rh-catalyzed asym. hydrogenation of benchmark substrates furnishing enantiomeric excess values up to 96%.

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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.Nava, Paola; Toure, Momar; Abdou Mohamed, Amel; Parrain, Jean-Luc; Chuzel, Olivier researched the compound: Bis(norbornadiene)rhodium (I) tetrafluoroborate( cas:36620-11-8 ).Category: quinuclidine.They published the article 《Investigation of the rhodium-catalyzed hydroboration of NHC-boranes: the role of alkene coordination and the origin of enantioselectivity》 about this compound( cas:36620-11-8 ) in Dalton Transactions. Keywords: mechanism potential energy surface calculation hydroboration allylimidazolylidene NHC borane; rhodium catalyst intramol enantioselective hydroboration allylimidazolylidene borane. We’ll tell you more about this compound (cas:36620-11-8).

The mechanism of the intramol. enantioselective rhodium(I)-catalyzed hydroboration of NHC-boranes is investigated by exptl. reactivity measurements and mol. electronic structure calculations, within the framework of the D. Functional Theory and the RPA methods. The crucial role of alkene coordination and the origin of enantioselectivity are discussed. Two possible mechanisms are considered, via either prior hydride migratory insertion or boron migratory insertion. The min. energy computed pathway leads to the enantiomer exptl. observed, therefore supporting the hydride migratory insertion mechanism. Calculations of the final steps of the catalytic cycle, i.e. regeneration of the catalyst and release of the product, give us further insights into the mechanism and rationalize the exptl. results.

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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.Itoda, Marino; Naganawa, Yuki; Ito, Makoto; Nonaka, Hiroshi; Sando, Shinsuke researched the compound: Bis(norbornadiene)rhodium (I) tetrafluoroborate( cas:36620-11-8 ).Category: quinuclidine.They published the article 《Structural exploration of rhodium catalysts and their kinetic studies for efficient parahydrogen-induced polarization by side arm hydrogenation》 about this compound( cas:36620-11-8 ) in RSC Advances. Keywords: rhodium catalyst PHIP efficiency side arm hydrogenation kinetics. We’ll tell you more about this compound (cas:36620-11-8).

Parahydrogen-induced polarization (PHIP) is a rapid and cost-effective hyperpolarization technique using transition metal-catalyzed hydrogenation with parahydrogen. We examined rhodium catalysts and their kinetic studies, rarely considered in the research of current PHIP. It emerged that rhodium complexes with electron-donating bisphosphine ligands, with a dicyclohexylphosphino group, appear to be more effective than conventional rhodium catalysts.

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Recommanded Product: 36620-11-8. 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: Bis(norbornadiene)rhodium (I) tetrafluoroborate, is researched, Molecular C14H8BF4Rh, CAS is 36620-11-8, about HMF and furfural: Promising platform molecules in rhodium-catalyzed carbonylation reactions for the synthesis of furfuryl esters and tertiary amides.

A biomass involved rhodium-catalyzed carbonylative synthesis of furfuryl esters and tertiary amides has been developed. 5-Hydroxymethylfurfural (HMF) was used as both substrate and CO surrogate for the first time in a carbonylation reaction, and both alkyl and aryl iodides were tolerated well to afford the desired furfuryl esters in moderate to good yields. In addition, furfural was also utilized as a CO source for the synthesis of tertiary amides. A variety of tertiary amides were obtained in moderate to excellent yields with good functional groups compatibility. Notably, tertiary amines were used as the amine source through a C-N bond cleavage pathway in the absence of addnl. oxidant.

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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.Yuan, Jing; Liu, Chong; Chen, Yan; Zhang, Zhenfeng; Yan, Deyue; Zhang, Wanbin researched the compound: Bis(norbornadiene)rhodium (I) tetrafluoroborate( cas:36620-11-8 ).Formula: C14H8BF4Rh.They published the article 《Rhodium-catalyzed intramolecular hydroacylation of 1,2-disubstituted alkenes for the synthesis of 2-substituted indanones》 about this compound( cas:36620-11-8 ) in Tetrahedron. Keywords: indanone preparation rhodium catalyst intramol hydroacylation disubstituted alkene. We’ll tell you more about this compound (cas:36620-11-8).

The intramol. hydroacylation of 1,2-disubstituted alkenes was considered to be a challenging task due to the side reactions resulted from the lack of addnl. substituent at 1-position and the low activity caused by the steric hindrance of substituent at 2-position, and an asym. version was not considered possible due to problems associated with the racemization of the products. The authors have partially solved these problems. Catalyzed by an activated diphosphine-Rh complex and reacted in a selected dihalogenated solvent, the intramol. hydroacylation of o-(2-arylvinyl)benzaldehydes provided the corresponding 2-aryl-1-indanones in high yields, and its asym. variant using o-(2-alkylvinyl)benzaldehydes afforded chiral 2-alkyl-1-indanones in high yields and with moderate enantioselectivities.

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Formula: C14H8BF4Rh. The reaction of aromatic heterocyclic molecules with protons is called protonation. Aromatic heterocycles are more basic than benzene due to the participation of heteroatoms. Compound: Bis(norbornadiene)rhodium (I) tetrafluoroborate, is researched, Molecular C14H8BF4Rh, CAS is 36620-11-8, about Diverse saturated heterocycles from a hydroacylation/conjugate addition cascade. Author is Iwumene, Ndidi U. N.; Moseley, Daniel. F.; Pullin, Robert D. C.; Willis, Michael C..

Rhodium-catalyzed hydroacylation using alkynes substituted with pendant nucleophiles, delivers linear α,β-unsaturated enone intermediates with excellent regioselectivity. These adducts are used to construct a broad range of diversely substituted, saturated O-, N- and S-heterocycles in a one-pot process. Judicious choice of cyclisation conditions enabled isolation of O-heterocycles with high levels of diastereoselectivity. A variety of derivatization reactions are also performed, generating functionalized hydroacylation products. This sequence serves as a general approach for the synthesis of fully saturated heterocycles.

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Quality Control of Bis(norbornadiene)rhodium (I) tetrafluoroborate. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: Bis(norbornadiene)rhodium (I) tetrafluoroborate, is researched, Molecular C14H8BF4Rh, CAS is 36620-11-8, about Synthesis of proline analogs via Rh-catalyzed asymmetric conjugate addition. Author is Edelstein, Emma K.; Rankic, Danica A.; Dudley, Caroline C.; McMinn, Spencer E.; Adpressa, Donovon A..

An enantio- and diastereoselective Rh-catalyzed conjugate addition reaction for the synthesis of proline analogs is reported. A high-throughput experimentation campaign was used to identify an efficient chiral catalyst which was able to afford the desired products in high yield and with high levels of diastereo- and enantioselectivity. This method was used to afford a range of 3-substituted proline derivatives from readily available dehydroproline electrophiles and boronic acid nucleophiles.

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