Results 191 to 200 of about 930,809 (352)

New Radioactive Isotopes of Iridium [PDF]

, 1950
T. C. Chu
openalex   +1 more source

Visible‐Light‐Promoted Dearomatization for The Construction of Imidazole Scaffolds

Advanced Synthesis &Catalysis, EarlyView.
Lighting up flat aromatics: a visible‐light photocatalytic dearomative acylation of imidazo[1,2‐a]pyridines using α‐keto acids as sustainable acyl radical precursors is reported, leading to dual fluorescent imidazoles. Dearomatization is a powerful strategy for constructing complex carbocycles and heterocycles, though it typically relies on harsh ...
Silvia Roscales, Aurelio G. Csáky
wiley   +1 more source

Isotopic Fractionation and Kinetic Isotope Effects of a Purified Bacterial Nitric Oxide Reductase (NOR). [PDF]

Biochemistry
Rivett ED, Finders CM, Haslun JA, Gandhi H, Kahle M, Ädelroth P, Ostrom PH, Ostrom NE, Hegg EL.   +8 more
europepmc   +1 more source

DISTRIBUTION OF ISOTOPIC NITROGEN IN AZOTOBACTER VINELANDII

, 1942
R. H. Burris
openalex   +1 more source

DOSAGE DETERMINATION IN THE USE OF RADIOACTIVE ISOTOPES [PDF]

, 1949
L. D. Marinelli
openalex   +1 more source

One‐Pot Cascade Synthesis of Isoquinolinone‐Fused Quinoxalines Through Sequential Rh(III)/Pd(II) Catalysis

Advanced Synthesis &Catalysis, EarlyView.
A new one‐pot, dual catalytic strategy for the synthesis of polycyclic isoquinolinone‐fused quinoxalines from commercially available N‐(2‐acetamidophenyl)benzamides and 1,3‐diynes is reported. This transformation proceeds via Rh(III)/Pd(II)‐mediated sequential NH/CH activation/annulation. Detailed mechanistic studies elucidate the reaction pathway. A
Wei‐Jung Chiu, Indrajeet J. Barve, Hung‐Sheng Hsieh, Chung‐Ming Sun   +3 more
wiley   +1 more source

Enhanced deep Southern Ocean stratification during the lukewarm interglacials. [PDF]

Nat Commun
Huang H, Fietzke J, Gutjahr M, Frank M, Kuhn G, Zhang X, Hillenbrand CD, Li D, Hu J, Yu J.   +9 more
europepmc   +1 more source

ISOTOPE DERIVATIVE ANALYSIS FOR PROLINE, VALINE, METHIONINE, AND PHENYLALANINE

, 1951
Sidney F. Velick, Sidney Udenfriend
openalex   +1 more source

Alpha-Decay Energies of Polonium Isotopes [PDF]

, 1951
D.G. Karraker, A. Ghiorso, David H. Templeton   +2 more
openalex   +1 more source

Cooperative Photocatalysis of 9,10‐Phenanthrenequinone and Sn(OTf)2 for Direct Mannich Reaction of Ethers via Hydrogen Atom Transfer Pathway

Advanced Synthesis &Catalysis, EarlyView.
A dual photocatalytic system of o‐PQ and Sn(OTf)2 enables visible light‐induced Mannich‐type addition of ethers to nitrones via Csp³–H activation. This oxidant‐free method offers broad scope and good yields. Mechanistic studies suggest that a photoexcited o‐PQ–Sn(II) complex mediates hydrogen atom transfer to form α‐oxy radicals for nitrone addition. A
Pradip Ramdas Thorve, Hun Young Kim, Kyungsoo Oh   +2 more
wiley   +1 more source