Category: 36620-11-8

Safety of Bis(norbornadiene)rhodium (I) tetrafluoroborate. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: Bis(norbornadiene)rhodium (I) tetrafluoroborate, is researched, Molecular C14H8BF4Rh, CAS is 36620-11-8, about Efficient Access to Chiral β-Borylated Carboxylic Esters via Rh-Catalyzed Hydrogenation. Author is Liu, Gang; Li, Anqi; Qin, Xueyuan; Han, Zhengyu; Dong, Xiu-Qin; Zhang, Xumu.

Rh/bisphosphine-thiourea ligand (ZhaoPhos)-catalyzed asym. hydrogenation of (Z)-β-substituted-β-boryl-α,β-unsaturated esters was successfully developed, furnishing a variety of chiral β-borylated carboxylic esters with high yields and excellent enantioselectivities (up to 99% yield and >99% ee). The gram-scale asym. hydrogenation was performed efficiently in the presence of only 0.05 mol% (S/C = 2000) catalyst loading with full conversion, 99% yield and 99% ee. Moreover, the hydrogenation product was easily converted to other versatile synthetic intermediates, such as Me (S)-3-hydroxy-3-phenylpropanoate and Me (S)-3-(furan-2-yl)-3-phenylpropanoate.

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Recommanded Product: Bis(norbornadiene)rhodium (I) tetrafluoroborate. Aromatic heterocyclic compounds can also be classified according to the number of heteroatoms contained in the heterocycle: single heteroatom, two heteroatoms, three heteroatoms and four heteroatoms. Compound: Bis(norbornadiene)rhodium (I) tetrafluoroborate, is researched, Molecular C14H8BF4Rh, CAS is 36620-11-8, about Highly Chemo- and Enantioselective Hydrogenation of 2-Substituted-4-oxo-2-alkenoic Acids. Author is Liu, Xian; Wen, Jialin; Yao, Lin; Nie, Huifang; Jiang, Ru; Chen, Weiping; Zhang, Xumu.

The highly chemo- and enantioselective hydrogenation of (E)-2-substituted-4-oxo-2-alkenoic acids was established for the first time using the Rh/JosiPhos complex, affording a series of chiral α-substituted-γ-keto acids with excellent results (up to 99% yield and >99% ee) and high efficiency (up to 3000 TON). In addition, the importance of this methodol. was further demonstrated by a concise and gram-scale synthesis of the anti-inflammatory drug (R)-flobufen.

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Yuan, Jing; Liu, Chong; Chen, Yan; Zhang, Zhenfeng; Yan, Deyue; Zhang, Wanbin published the article 《Rhodium-catalyzed intramolecular hydroacylation of 1,2-disubstituted alkenes for the synthesis of 2-substituted indanones》. Keywords: indanone preparation rhodium catalyst intramol hydroacylation disubstituted alkene.They researched the compound: Bis(norbornadiene)rhodium (I) tetrafluoroborate( cas:36620-11-8 ).Reference of Bis(norbornadiene)rhodium (I) tetrafluoroborate. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:36620-11-8) here.

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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Edelstein, Emma K.; Rankic, Danica A.; Dudley, Caroline C.; McMinn, Spencer E.; Adpressa, Donovon A. 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 ).Product Details 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.

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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The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: Bis(norbornadiene)rhodium (I) tetrafluoroborate( cas:36620-11-8 ) is researched.COA of Formula: C14H8BF4Rh.Gilbert, Sophie H.; Fuentes, Jose A.; Cordes, David B.; Slawin, Alexandra M. Z.; Clarke, Matthew L. published the article 《Phospholane-Phosphite Ligands for Rh Catalyzed Enantioselective Conjugate Addition: Unusually Reactive Catalysts for Challenging Couplings》 about this compound( cas:36620-11-8 ) in European Journal of Organic Chemistry. Keywords: phospholane phosphite chiral ligand preparation; rhodium catalyst enantioselective conjugate addition unsaturated carbonyl arylboronic acid. Let’s learn more about this compound (cas:36620-11-8).

The use of Rh catalysts derived from a phospholane-phosphite ligand were found to be more productive than the classic rhodium/BINAP system in enantioselective conjugate additions These catalysts enable the use of lower amounts of aryl boronic acid in an asym. arylation reaction that required an impractical excess of nucleophile. This catalyst was also found to enable the coupling of a poorly reactive Michael acceptor, N-CBz-2-3-dehydro-4-piperidone, or the coupling of poorly reactive 2-furyl boronic acids at ambient or near temperatures

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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.COA of Formula: C14H8BF4Rh. The article 《Rhodium-catalyzed intramolecular hydroacylation of 1,2-disubstituted alkenes for the synthesis of 2-substituted indanones》 in relation to this compound, is published in Tetrahedron. Let’s take a look at the latest research on 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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Category: quinuclidine. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: Bis(norbornadiene)rhodium (I) tetrafluoroborate, is researched, Molecular C14H8BF4Rh, CAS is 36620-11-8, about Double Asymmetric Hydrogenation of α-Iminoketones: Facile Synthesis of Enantiopure Vicinal Amino Alcohols. Author is Wang, Jiang; Lin, Xin; Shao, Pan-Lin; Song, Jingyuan; Wen, Jialin; Zhang, Xumu.

This study presents an Rh/DuanPhos-catalyzed double asym. hydrogenation of α-iminoketones R1C(O)C(=NPMP)R2 (R1 = Ph, 1-naphthyl, 2-thienyl, etc.; R2 = Ph, 2-naphthyl, 2-thienyl, etc.) for accessing chiral vicinal amino alcs., (1R,2S)-R1C(OH)C(NHPMP)R2 which are privileged motifs in pharmaceuticals, agrochems., fine chems., chiral auxiliaries, organocatalysts, etc. Compared with existing methods, this methodol. has the following advantages, such as one-pot operation, high efficiency, operational simplicity, limited waste, broad reaction scope, and high yields (90 to 96%) and stereoselectivities (up to >99:1 dr; >99.9% ee). In addition, the mechanism of the transformation was revealed to be a stepwise reaction by isolating and analyzing reaction intermediates.

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Liu, Gang; Li, Anqi; Qin, Xueyuan; Han, Zhengyu; Dong, Xiu-Qin; Zhang, Xumu 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 ).SDS of cas: 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.

Rh/bisphosphine-thiourea ligand (ZhaoPhos)-catalyzed asym. hydrogenation of (Z)-β-substituted-β-boryl-α,β-unsaturated esters was successfully developed, furnishing a variety of chiral β-borylated carboxylic esters with high yields and excellent enantioselectivities (up to 99% yield and >99% ee). The gram-scale asym. hydrogenation was performed efficiently in the presence of only 0.05 mol% (S/C = 2000) catalyst loading with full conversion, 99% yield and 99% ee. Moreover, the hydrogenation product was easily converted to other versatile synthetic intermediates, such as Me (S)-3-hydroxy-3-phenylpropanoate and Me (S)-3-(furan-2-yl)-3-phenylpropanoate.

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Most of the compounds have physiologically active properties, and their biological properties are often attributed to the heteroatoms contained in their molecules, and most of these heteroatoms also appear in cyclic structures. A Journal, Article, Chemical Science called Efficient synthesis of chiral 2,3-dihydro-benzo[b]thiophene 1,1-dioxides via Rh-catalyzed hydrogenation, Author is Liu, Gongyi; Zhang, Heng; Huang, Yi; Han, Zhengyu; Liu, Gang; Liu, Yuanhua; Dong, Xiu-Qin; Zhang, Xumu, which mentions a compound: 36620-11-8, SMILESS is [F-][B+3]([F-])([F-])[F-].C12=C3[Rh+]14567(C8=C5C9C6=C7C8C9)C%10=C4C2CC3%10, Molecular C14H8BF4Rh, Product Details of 36620-11-8.

Rh-catalyzed asym. hydrogenation of prochiral substituted benzo[b]thiophene 1,1-dioxides was successfully developed, affording various chiral 2,3-dihydrobenzo[b]thiophene 1,1-dioxides I (R = H, 6-MeO; R1 = C6H5, 4-MeOC6H4, 4-FC6H4, etc.; R2 = C6H5, 4-MeOC6H4, 3-H3CC6H4, etc.) with high yields and excellent enantioselectivities (up to 99% yield and >99% ee). In particular, for challenging substrates, such as aryl substituted substrates with sterically hindered groups and alkyl substituted substrates, the reaction proceeded smoothly in catalytic system with excellent results. The gram-scale asym. hydrogenation proceeded well with 99% yield and 99% ee in the presence of 0.02 mol% (S/C = 5000) catalyst loading. The possible hydrogen-bonding interaction between the substrate and the ligand may play an important role in achieving high reactivity and excellent enantioselectivity.

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The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: Bis(norbornadiene)rhodium (I) tetrafluoroborate, is researched, Molecular C14H8BF4Rh, CAS is 36620-11-8, about Facile access to functionalized chiral secondary benzylic boronic esters via catalytic asymmetric hydroboration, the main research direction is chiral secondary benzylic boronic ester preparation; stereoselective hydroboration regioselective allylic phosphonate rhodium catalyst.Reference of Bis(norbornadiene)rhodium (I) tetrafluoroborate.

Allylic and homoallylic phosphonates bearing an aryl or heteroaryl substituent at the γ- or δ-position undergo rhodium-catalyzed asym. hydroboration by pinacolborane to give functionalized chiral secondary benzylic boronic esters in yields up to 86% and enantiomer ratios up to 99 : 1. Compared to minimally-functionalized terminal and 1,1-disubstituted vinyl arenes, there are relatively few reports of efficient catalytic asym. hydroboration (CAHB) of more highly functionalized internal alkenes. Phosphonate substrates bearing a variety of common heterocyclic ring systems, including furan, indole, pyrrole and thiophene derivatives, as well as those bearing basic nitrogen substituents (e.g., morpholine and pyrazine) are tolerated, although donor substituents positioned in close proximity of the alkene can influence the course of the reaction. Stereoisomeric (E)- and (Z)-substrates afford the same major enantiomer of the borated product. Deuterium-labeling studies reveal that rapid (Z)- to (E)-alkene isomerization accounts for the observed (E/Z)-stereoconvergence during CAHB. The synthetic utility of the chiral boronic ester products is illustrated by stereospecific C-B bond transformations including stereoretentive electrophile promoted 1,2-B-to-C migrations, stereoinvertive SE2 reactions of boron-ate complexes with electrophiles, and stereoretentive palladium- and rhodium-catalyzed cross-coupling protocols.

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