Category: 3893-18-3

Xu, Ming-Hui; Tu, Yong-Qiang; Tian, Jin-Miao; Zhang, Fu-Min; Wang, Shao-Hua; Zhang, Shi-Heng; Zhang, Xiao-Ming published the artcile< Asymmetric epoxidation of α,β-unsaturated aldehydes catalyzed by a spiro-pyrrolidine-derived organocatalyst>, COA of Formula: C9H7BrO, the main research area is epoxide preparation diastereoselective enantioselective; aldehyde unsaturated asym epoxidation spiro pyrrolidine organocatalyst.

The asym. epoxidation of α,β-unsaturated aldehydes R1R2C=CHCHO [R1 = CH3CH2, 4-ClC6H4, naphthalen-2-yl, etc.; R2 = H, CH3; R1R2 = -(CH2)4-], catalyzed by a spiro-pyrrolidine (SPD)-derived organocatalyst, has been accomplished with good diastereoselectivities (up to dr >20:1) and with high to excellent enantioselectivities (up to 99% ee).

Tetrahedron: Asymmetry published new progress about Alcohols, epoxy Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 3893-18-3 belongs to class bromides-buliding-blocks, and the molecular formula is C9H7BrO, COA of Formula: C9H7BrO.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Tarnowicz, Stanislawa; Alsalahi, Waleed; Mieczynska, Ewa; Trzeciak, Anna M. published the artcile< Heck arylation of allyl alcohol catalyzed by Pd(0) nanoparticle>, Reference of 3893-18-3, the main research area is Heck arylation allyl alc palladium nanoparticle catalyzed; palladium nanoparticle preparation catalyst allyl alc Heck arylation.

Pd(0) nanoparticle ca. 2 nm in diameter were obtained by the reduction of PdCl2 and Pd(OAc)2 in water at 80° in the presence of a PVP-stabilizing polymer. Pd(0) NPs were successfully used in the Heck coupling of allyl alc. with iodo- and bromobenzenes. Iodobenzenes reacted under solventless conditions or in DMF solution producing 3-arylpropanals and 2-arylpropanals as the main products. The same products were obtained in the reaction of bromobenzene in TBAB as the reaction medium. The stability of Pd(0) NPs was evidenced in recycling experiments Similar Heck coupling results were also obtained with the palladium compounds PdCl2(cod) and Pd(OAc)2 under the same conditions.

Tetrahedron published new progress about Heck reaction. 3893-18-3 belongs to class bromides-buliding-blocks, and the molecular formula is C9H7BrO, Reference of 3893-18-3.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Zhou, Yangyang; Chen, Chen; Li, Qiling; Liu, Yanbo; Wei, Ting; Liu, Youzhen; Zeng, Zebing; Bradshaw, Darren; Zhang, Bing; Huo, Jia published the artcile< Precise control of selective hydrogenation of α,β-unsaturated aldehydes in water mediated by ammonia borane>, Product Details of C9H7BrO, the main research area is unsaturated aldehyde selective hydrogenation ammonia borane catalyst.

Hydrogenation of unsaturated biomass in a control manner is highly desirable but challenging, especially under mild conditions. We here report selective hydrogenation of α,β-unsaturated aldehydes (UALs), featuring a precise control of all potential products by adjustment of the role of ammonia borane (AB) in transfer and/or catalytic hydrogenation. The hydrogenation can be readily operated in neat water without using any external H2-source, because AB as the H2-source is favorable in aqueous solution Impressively, unsaturated alcs. are prepared in 100% conversion by the room-temperature transfer hydrogenation of UALs with AB, while saturated aldehydes are obtained in 100% conversion and > 90% selectivity with high activity (i.e., turnover frequency = 0.98 s-1 for cinnamaldehyde), by the catalytic hydrogenation with H2 released from AB and Pd immobilized on two-dimensional metal organic layer. On the other hand, UALs can be completely converted into the saturated alcs. through a combination of transfer and catalytic hydrogenation in one pot. This strategy can be extended to more than 8 types of UALs, and provides a facile way to fine-control the selective hydrogenation of unsaturated compounds with competing bonds.

Applied Catalysis, B: Environmental published new progress about 3893-18-3. 3893-18-3 belongs to class bromides-buliding-blocks, and the molecular formula is C9H7BrO, Product Details of C9H7BrO.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Zhang, Yong; Wei, Biaowen; Lin, Hui; Cui, Weirong; Zeng, Xianqiang; Fan, Xiaolin published the artcile< Organocatalyzed Asymmetric Vinylogous Michael Reactions of 3,5-Dialkyl-Substituted 4-Nitroisoxazoles: A Direct Method for the Synthesis of Chiral Isoxazole Derivatives>, Computed Properties of 3893-18-3, the main research area is isoxazole preparation enantioselective; aldehyde unsaturated nitroisoxazole vinylogous Michael addition organocatalyst.

A direct method for the synthesis of chiral isoxazole derivatives I (R = 3-BrC6H4, naphth-1-yl, 2-thienyl, etc.) via asym. vinylogous Michael addition of 3,5-dialkyl-substituted 4-nitroisoxazoles with α,β-unsaturated aldehydes catalyzed by a diphenylprolinol TBS ether organocatalyst is described. This approach provides an easy access to highly functionalized chiral isoxazole derivatives with moderate to good yields and up to excellent enantioselectivities (96% ee).

Advanced Synthesis & Catalysis published new progress about Acetals Role: SPN (Synthetic Preparation), PREP (Preparation). 3893-18-3 belongs to class bromides-buliding-blocks, and the molecular formula is C9H7BrO, Computed Properties of 3893-18-3.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Zhang, Kaiheng; Sheng, Xiang; Deiana, Luca; Svensson Grape, Erik; Ken Inge, A.; Himo, Fahmi; Cordova, Armando published the artcile< Solvent Dependency in Stereoselective δ-Lactam Formation of Chiral α-Fluoromalonate Derivatives: Stereodivergent Synthesis of Heterocycles with Fluorine Containing Stereocenters Adjacent to Tertiary Stereocenters>, SDS of cas: 3893-18-3, the main research area is bicyclic lactam stereoselective preparation.

The discovery and investigation of solvent dependency in stereoselective intramol. amidation of chiral 5-aminofunctionalized-2-fluoromalonate ester derivatives, which gave access to highly functionalized δ-lactams with a quaternary fluorine-containing stereocenter was disclosed. Exptl. work together with d. functional theory calculations led to understanding of how to direct and switch the stereochem. outcome of the stereoselective δ-lactam formation. The merging of this solvent-dependent stereoselective switch with asym. catalysis and cascade reactions gave access to an unprecedented strategy for stereodivergent synthesis of all possible stereoisomers of fluorine-containing stereocenters adjacent to tertiary stereocenters of a wide range of heterocyclic compounds with 95->99% ee in one-pot. It was also useful for application in total synthesis of fluorine-containing pharmaceuticals.

Advanced Synthesis & Catalysis published new progress about Amidation (intramol.). 3893-18-3 belongs to class bromides-buliding-blocks, and the molecular formula is C9H7BrO, SDS of cas: 3893-18-3.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Li, Wenjun; Li, Xin; Ye, Tingting; Wu, Wenbin; Liang, Xinmiao; Ye, Jinxing published the artcile< Asymmetric organocatalytic Michael/α-alkylation reaction of α,β-unsaturated aldehyde with chloroacetophenone>, Category: bromides-buliding-blocks, the main research area is unsaturated aldehyde chloroacetophenone Jorgensen Hayashi catalyst asym Michael alkylation; cyclopropanecarboxaldehyde stereoselective preparation.

Asym. organocatalytic Michael/α-alkylation reactions of α,β-unsaturated aldehydes with chloroacetophenones have been developed. The biol. useful cyclopropane motifs, e.g. I, were synthesized with high yields and up to >99% ee, >30:1 dr through Jorgensen-Hayashi catalyst under mild conditions.

Tetrahedron Letters published new progress about Alkylation catalysts, stereoselective. 3893-18-3 belongs to class bromides-buliding-blocks, and the molecular formula is C9H7BrO, Category: bromides-buliding-blocks.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Ling, Bo; Yang, Wenjun; Wang, Yan-En; Mao, Jianyou published the artcile< Cooperative N-Heterocyclic Carbene/Palladium-Catalyzed Umpolung 1,4-Addition of Vinyl Bromides to Enals>, Related Products of 3893-18-3, the main research area is unsaturated carbonyl preparation cooperative catalyzed addition vinyl bromide enal.

A highly stereoselective umpolung 1,4-addition of vinyl bromides to enals is enabled by NHC/palladium cooperative catalysis, generating various valuable γ,δ-unsaturated carbonyl derivatives in excellent yields (up to 90%). A detailed mechanism investigation indicates the NHC act as both organocatalyst and ligand for palladium during this system.

Organic Letters published new progress about Addition reaction. 3893-18-3 belongs to class bromides-buliding-blocks, and the molecular formula is C9H7BrO, Related Products of 3893-18-3.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Lin, Shuangzheng; Zhao, Gui-Ling; Deiana, Luca; Sun, Junliang; Zhang, Qiong; Leijonmarck, Hans; Cordova, Armando published the artcile< Dynamic kinetic asymmetric domino oxa-Michael/carbocyclization by combination of transition-metal and amine catalysis: catalytic enantioselective synthesis of dihydrofurans>, Recommanded Product: 3-(4-Bromophenyl)acrylaldehyde, the main research area is dihydrofuran derivative enantioselective synthesis; propargyl alc enal Michael carbocyclization chiral amine; transition metal catalyst reduction oxidation epoxidation.

An unprecedented highly enantioselective domino oxa-Michael/carbocyclization between propargyl alcs. and enals by combination of asym. amine and transition-metal catalysis has been developed. The DYKAT gives access to valuable dihydrofurans I (R = 4-NO2-C6H4, 4-CN-C6H4, 3-NO2-C6H4, 4-Br-C6H4, 4-Cl-C6H4, Ph, 4-Me-C6H4, 2-naphtheyl, 4-F-C6H4, nPr) in good to high yields with e.r. of up to 99.5 :0.5. The reduction of I (R = 2-naphthyl, 4-Cl-C6H4) yields alcs. Oxidation or epoxidation reactions are investigated.

Chemistry – A European Journal published new progress about Alcohols, propargyl Role: RCT (Reactant), RACT (Reactant or Reagent). 3893-18-3 belongs to class bromides-buliding-blocks, and the molecular formula is C9H7BrO, Recommanded Product: 3-(4-Bromophenyl)acrylaldehyde.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Li, Sifeng; Yang, Qingjing; Wang, Jun published the artcile< Copper(II) triflate-catalyzed highly efficient synthesis of N-substituted 1,4-dihydropyridine derivatives via three-component cyclizations of alkynes, amines, and α,β-unsaturated aldehydes>, Reference of 3893-18-3, the main research area is pyridine dihydro preparation; three component reaction alkyne amine unsaturated aldehyde copper catalyst; dihydropyridine preparation.

A copper(II) triflate-catalyzed three-component cyclization of alkynes, amines, and α,β-unsaturated aldehydes was developed to give various 1,4-dihydropyridines in good to high yields. In addition, this efficient and practical protocol proceeded smoothly in gram scale even when the catalytic loading was reduced to 1 mol %.

Tetrahedron Letters published new progress about Alkynes Role: RCT (Reactant), RACT (Reactant or Reagent). 3893-18-3 belongs to class bromides-buliding-blocks, and the molecular formula is C9H7BrO, Reference of 3893-18-3.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Cao, Feng-Xia; Zhao, Li-Ming published the artcile< Cyclization of 1,4-dihydroxyanthraquinone with α,β-unsaturated aldehyde: a new strategy for the synthesis of cyclopentanoids>, Category: bromides-buliding-blocks, the main research area is cyclopentanoid preparation dihydroxyanthraquinone cyclization alpha beta unsaturated aldehyde.

A cascade cyclization strategy was developed for the synthesis of cyclopentane-fused anthraquinones through the condensation of 1,4-dihydroxyanthraquinone with α,β-unsaturated aldehydes in the presence of common inorganic base NaOH. These fused-tetracyclic anthraquinone products are formed in a single step from readily accessible starting materials under very mild conditions without the use of any expensive or complex reagents. This method represents an unprecedented example of a base-promoted protocol to access five-membered carbocyclic rings in a single step. Moreover, this chem. also provides useful guidance for the preparation of 6,5-fused ring systems.

Tetrahedron Letters published new progress about Crystal structure. 3893-18-3 belongs to class bromides-buliding-blocks, and the molecular formula is C9H7BrO, Category: bromides-buliding-blocks.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary