Results 81 to 90 of about 4,159,820 (313)
Columbus Free Press subscription letter [PDF]
, 1990 Form letter encouraging subscription to and financial support for the Columbus Free Press, dated January 1990 as the publication was celebrating its 20th anniversary. The Columbus Free Press began as a bi-weekly publication in Columbus, Ohio, in 1970.
Columbus Free Press (Publisher)
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Metal- and Hydride-Free Pentannulative Reductive Aldol Reaction [PDF]
, 2018 Traditionally, the reductive aldol reaction is a metal-catalyzed and hydride-promoted coupling between enones and aldehydes. We present a phosphine-mediated diastereoselective intramolecular reductive aldol reaction of α-substituted dienones and ...
Lona Dutta (6083462) +2 more
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Beilstein Journal of Organic Chemistry, 2018 An intriguing DABCO-catalyzed and DBU-promoted one-pot synthesis of an important class of (2-hydroxyaryl)pyridine derivatives bearing a carboxylate or a nitrile group suitably placed at C3 position of the aza-ring has been achieved in acceptable chemical
Soumitra Guin +3 more
doaj +1 more source
Small Structures, 2023 Tuning the electronic property of active center to balance the adsorption ability and reactivity of oxygen is essential for achieving 2e− oxygen reduction reaction (ORR) for electrocatalytic synthesis of hydrogen peroxide (H2O2), still represents a grand
Shaoda Huang +9 more
doaj +1 more source
Metal Free Phosphorus Butterfly Compounds
European Journal of Inorganic Chemistry, 2020 AbstractMetal‐free organophosphorus are demanded compounds due to their interesting properties in a variety of applications, spanning from fine to material chemistry. Unfortunately, their synthesis is very challenging, requiring a precise design of the reaction conditions to avoid the conspicuous formation of undesired products.
Franco Scalambra, Antonio Romerosa
openaire +2 more sources
Evolutionarily divergent DUF4465 domains have a common vitamin B12‐binding function
FEBS Open Bio, EarlyView.We show that DUF4465 family proteins, widespread across bacteria from gut microbiomes, hydrothermal vents, and soil, share a common vitamin B12‐binding function. These augmented β‐jellyroll proteins bind vitamin B12 via extended loops. Our findings establish sequence‐diverse DUF4465 proteins as a widespread class of B12‐binding proteins, highlighting ...
Charlea Clarke +4 more
wiley +1 more source
Photochemical Doyle-Kirmse Reaction – a Metal-Free Route to Allenes [PDF]
, 2019 This report describes metal-free, blue light-induced [2,3]-sigmatropic rearrangement of sulfonium ylides generated from donor/acceptor diazoalkanes and propargyl sulfides.
Katarzyna, Rybicka-Jasińska +3 more
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MoleculesThe incorporation of amide groups into biologically active molecules has been proven to be an efficient strategy for drug design and discovery. In this study, we present a simple and practical method for the synthesis of amide-containing quinazolin-4(3H)-
Jia-Jun Tang +4 more
doaj +1 more source
Metal-free syn-dioxygenation of alkenes [PDF]
Organic & Biomolecular Chemistry, 2013 Reactions employing inexpensive reagents from sustainable sources and with low toxicity are becoming increasingly desirable from an academic and industrial perspective. A fascinating example of a synthetic transformation that requires development of alternative procedures is the osmium catalysed dihydroxylation.
Rawling, Michael, Tomkinson, Nick
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Mass spectrometry based identification of AMP‐O‐Tris generated by Thermococcus onnurineus Cas10
FEBS Open Bio, EarlyView.Isolated Thermococcus onnurineus Cas10 generates the noncanonical ATP‐derived product AMP‐O‐Tris while in Tris‐containing buffer as identified via mass spectrometry, revealing relaxed nucleophile selectivity under isolated conditions. These findings suggest that multiprotein Csm complex assembly restricts Cas10 reactivity toward canonical cyclic ...
Su‐Jin Lee +6 more
wiley +1 more source