Results 151 to 160 of about 107,279 (237)

Iron‐Photocatalyzed Alkene Chloroaminoxylation: A Platform for Orthogonally Activatable Building Blocks

Angewandte Chemie, EarlyView.
An iron‐photocatalyzed unsymmetrical 1,2‐hetero(atom)difunctionalization of alkenes enables to install orthogonal C–Cl and C–O (alkoxyamine) handles which provides access to diverse nucleophiles via complementary reactivity (SN and photoredox) at two distinct sites. Detailed mechanistic studies elucidate interesting features of the iron catalytic cycle.
Amrita Chaudhuri, Meghana Aladahalli Shekar, Mohammad Zafar, Marianne Engeser, Gregor Schnakenburg, Ala Bunescu   +5 more
wiley   +2 more sources

Molecular Engineering of a Mixed‐Spacer System Toward High‐Performance Polycarbazole Anion‐Exchange Membranes

Angewandte Chemie, EarlyView.
Mixed‐spacer polycarbazole membranes balance conductivity, swelling, and stability by tuning hydration and ionic connectivity. The optimized membrane reaches 184 mS cm−1 hydroxide conductivity and 2.51 W cm−2 peak power density, offering a promising strategy for high‐performance ether‐free AEMs.
Hao Liu, Yingdan Cui, Chanikya D. Jayawardana, Mohammed Al Murisi, Hai Zhao, Md Waliullah Hossain, Zhitao Hu, Cem Arkun, Iftikhar Ahmad, Qi Wang, Sophya Garashchuk, William Mustain, Chuanbing Tang   +12 more
wiley   +2 more sources

Ferrocenylphosphine-imine ligands for Pd-catalyzed asymmetric allylic alkylation

, 2002
Ferrocenylphosphine-imine ligands 6 derived front (R,S)-PPFNH2-R 5 and a variety of benzaldehydes were applied in the Pd-catalyzed asymmetric allylic alkylation of 1,3-diphenylprop-2-en-1-yl acetate 7a or pivalate 7b with dimethyl malonate.
Wang, JW, Chen, HL, Bai, CM, Dai, HG, Hu, XP, Hu, XU, Zheng, Z   +6 more
core  

1,3‐Brook Rearrangement of α‐Silyl Allylic Alcohols: Copper‐Catalyzed Enantiospecific Formation of Allenes and Copper‐Mediated ipso‐Substitution Reactions Affording Trisubstituted Alkenes

Angewandte Chemie, EarlyView.
A regioselective ruthenium catalyzed trans‐hydrosilylation of propargyl alcohols followed by a 1,3‐Brook rearrangement opens access to reactive organocopper intermediates, which evolve upon warming into allenes with strict chirality transfer to the emerging axis; alternatively, these reactive species can be trapped with a large variety of electrophiles
Jack L. Sutro, Felix Anderl, Paul Haf‐Moths, Alois Fürstner   +3 more
wiley   +2 more sources

Radical enantioconvergent meta-C─H alkylation of pyridines. [PDF]

Sci Adv
Qin S, Gao X, Li Q, Zhang M, Lin Y, Wang M, Yang M, Wang S, Zhou Z, Gao H, Yi W, Zeng Z.   +11 more
europepmc   +1 more source

Ring‐Retentive Allylation of Cyclopropanols Through Interception of Enolized Homoenolates by π‐Allylpalladium

Angewandte Chemie, EarlyView.
Cyclopropanols undergo palladium‐catalyzed, zinc‐mediated allylation with allyl acetates: the ring opens transiently to an enolized homoenolate, is intercepted by π‐allylpalladium, and recloses to furnish β‐allylated cyclopropanols. This formal “allylic cyclopropylation” broadens the reaction space for ring‐retentive functionalization of cyclopropanols.
Kento Tsukiji, Sena Miura, Naohiko Yoshikai   +2 more
wiley   +2 more sources

Phosphine-Free NNN Bis-Iminopyridine Supported Zinc(II) Catalysts: A Sustainable Platform for C─C Bond Formation Reactions via Borrowing Hydrogen Approach of Primary Alcohols. [PDF]

Chem Asian J
Saini R, Kukreti P, Pattnaik T, Chauhan R, Sharma K, Panwar A, Kumari S, Choudhury AR, Ghosh K.   +8 more
europepmc   +1 more source

tert-Butanesulfinylthioether ligands: synthesis and application in palladium-catalyzed asymmetric allylic alkylation

, 2011
A class of novel chiral SO-S-type bidentate ligands based on the tert-butylsulfinyl moiety as the sole chiral source were designed and synthesized through a simple and efficient pathway.
Liao, J (reprint author), Chinese Acad Sci, Key Lab Asymmetr Synth & Chirotechnol Sichuan Pro, Chengdu Inst Organ Chem, Chengdu 610041, Peoples R China., Chen, Guihua, Liu, Jibing, Liao, Jian, Xing, Junwei   +4 more
core  

Intramolecular Nickel‐Catalyzed Reductive Coupling: Enantioselective Synthesis of Tetrahydroisoquinolines and Related Heterocycles

Angewandte Chemie, EarlyView.
The successful extension of the nickel‐catalyzed asymmetric coupling of polarized 1,3‐dienes with aldehydes to an intramolecular setting opens an efficient new entry into hydroxylated N‐heterocyclic compounds, most notably valuable tetrahydroisoquinolines.
Thilo Bender, Markus Leutzsch, Yannik Sell, Alois Fürstner   +3 more
wiley   +2 more sources

Reactivity of Nitroarenes toward Alkyl Radicals Enables Direct C-H Alkylation. [PDF]

J Am Chem Soc
Das K, Chakraborty S, Paenurk E, König B.   +3 more
europepmc   +1 more source