Results 151 to 160 of about 86,355 (288)
, 1990 Secondary benzyl acetates complexed by Cr(CO)3 react 100% stereoselectively with enolsilanes in the presence of ZnCl2 in a process which amounts to α-alkylation of carbonyl ...
Sauerwald, M., Reetz, M.
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Asymmetric Iron‐Catalyzed Vicinal C(sp3)─H Diamination of Carboxylic Acids
Angewandte Chemie, EarlyView.An iron‐catalyzed vicinal α,β‐C(sp3)─H diamination of readily available carboxylic acids furnishes chiral α,β‐diamino acids in a single pot with high regio‐, diastereo‐, and enantioselectivity (up to >20:1 dr and >99% ee). ABSTRACT The direct construction of chiral 1,2‐diamines through the stereoselective functionalization of two vicinal C(sp3)─H bonds
Bing Zhou +5 more
wiley +2 more sources
Catalytic Functionalization of Unactivated π‐Bonds Enabled by Bidentate Directing Auxiliaries
Angewandte Chemie, EarlyView.This review explores how bidentate directing auxiliaries have advanced transition‐metal catalysis for unactivated alkene/alkyne functionalization. By leveraging chelated intermediates, bidentate directing auxiliaries enable precise hydrofunctionalization, difunctionalization, and C─H activation of π‐bonds with unique selectivity and reactivity.
Seunghyeon Cho +4 more
wiley +2 more sources
Exploring Benzyl Alcohol Derivatives and Related Compounds in the Cleaning of Oil Paintings
This study examines five benzyl alcohol derivatives and three chemically similar compounds and compares them against benzyl alcohol in gelled emulsions for the removal of overpaint during cleaning of oil paintings.
Alvarez-Martin, A., Liu, C., Keune, K.
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Non‐Dilute Synthesis of Macrodiolides and Macrotetrolides Enabled by Confinement Catalysis
Angewandte Chemie, EarlyView.Confinement catalysis within a hexameric resorcin[4]arene capsule enables macrolactonization under non‐dilute conditions (up to 0.1 M), overcoming the limitations of high‐dilution protocols (0.1–10 mM). This strategy provides direct access to 18–32‐membered macrodiolides and 26–32‐membered macrotetrolides in one pot and unlocks previously inaccessible ...
Feng‐Yuan Wang +3 more
wiley +2 more sources
Synthesis and cytostatic activity of 2,6-diamino-9-benzyl-9-deazapurine and related compounds
, 2002 2,6-Diamino-9-benzyl-9-deazapurine and 9-benzyl-2,6-bis(benzylamino)-9-deazapurine were synthesized by reductive cyclization of the corresponding 6-cyanomethyl-5-nitropyrimidines.
Otmar, Miroslav
core
, 2012 Submission note: A thesis submitted in total fulfilment of the requirements for the degree of Master of Science to the School of Pharmacy and Applied Science, School of Molecular Sciences, Faculty of Science, Technology and Engineering, La Trobe ...
Tyson Belz (14367105)
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Transition Metal‐Free Heteroarene Insertion Into C─C Bonds of Benzocyclobutenones
Angewandte Chemie, EarlyView.A transition metal‐free insertion of five‐membered heteroarenes into the C─C bonds of benzocyclobutenones has been achieved under mild and operationally simple conditions. This method provides an efficient and modular approach to access fused partially saturated hetero‐polycyclic scaffolds that exist in many bioactive molecules.
Cole J. Wagner, Guangbin Dong
wiley +2 more sources
Angewandte Chemie, EarlyView.The vibrational frequencies of “dangling” water O─H bonds can be determined by Raman hydration‐ shell spectroscopy and used to differentiate chaotropes from kosmotropes and hydrophobes. Dangling O─H bonds are also detected around superchaotropic anions of the borate cluster type (B12X122−; X = H, F, Cl, Br, and I) but their frequencies do not directly ...
Werner M. Nau +6 more
wiley +2 more sources
Angewandte Chemie, EarlyView.Heterogeneous iron‐catalyzed environmentally benign and sustainable CH‐oxidative esterification methodology has been developed for the synthesis of esters. This challenging reaction has been achieved by the rational design of specific single atom iron‐based catalyst with Fe‐N4 active centers, which empowered the oxidative esterification of methyl and ...
Zhuang Ma +8 more
wiley +2 more sources