Results 21 to 30 of about 195,901 (244)
Regioselective Alkylation of an Oxonaphthalene-Annelated Pyrrol System
Molbank, 2009 The regioselective alkylation of an oxonaphthalene-annelated pyrrole system is reported. The regioselectivity of alkylation can be controlled by the selection of the solvent.
Helmut Spreitzer, Christiane Puschmann
doaj +1 more source
Meitan kexue jishu, 2023 Coal-tar pitch (CTP) is a substance produced by ambient and/or vacuum distillation of high-temperature coal tar, although CTP has a large yield in China, however its wide application is limited due to its high toxicity.
ZHANG Wenshuo +5 more
doaj +1 more source
Alkylating Agents Stronger than Alkyl Triflates [PDF]
Journal of the American Chemical Society, 2004 A new class of potent electrophilic "R(+)" alkylating agents has been developed using weakly nucleophilic carborane anions as leaving groups. These reagents, R(CHB(11)Me(5)X(6)) (R = Me, Et, and i-Pr; X = Cl, Br), are prepared via metathesis reactions with conventional alkylating agents such as alkyl triflates, using the high oxophilicity of silylium ...
Kato, Tsuyoshi +4 more
openaire +4 more sources
Catalytic Alkylation of Brown Coal and Peat
Eurasian Chemico-Technological Journal, 2012 The alcohol alkylation of low-grade metamorphic coal and peat in the presence of mineral and organic acids was studied using FTIR, NMR, and GC-MS. The impact of the reaction conditions on the yield of extractable matter was investigated experimentally ...
S. I. Zherebtsov, Z. R. Ismagilov
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Study on the Alkylation Reactions of N(7)-Unsubstituted 1,3-Diazaoxindoles
Molecules, 2017 The chemistry of the 5,7-dihydro-6H-pyrrolo[2,3-d]pyrimidin-6-one (1,3-diazaoxindole) compound family, possessing a drug-like scaffold, is unexplored. In this study, the alkylation reactions of N(7)-unsubstituted 5-isopropyl-1,3-diazaoxindoles bearing ...
Eszter Kókai +5 more
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Molecules, 2021 Marine polysaccharides are part of the huge seaweeds resources and present many applications for several industries. In order to widen their potential as additives or bioactive compounds, some structural modifications have been studied.
Tiphaine Wong +6 more
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Synthesis, screening, and sequencing of cysteine-rich one-bead one-compound peptide libraries. [PDF]
, 2008 Cysteine-rich peptides are valued as tags for biarsenical fluorophores and as environmentally important reagents for binding toxic heavy metals. Due to the inherent difficulties created by cysteine, the power of one-bead one-compound (OBOC) libraries has
Greaves, John +3 more
core +2 more sources
Alkylation of Dihydrofullerenes [PDF]
The Journal of Organic Chemistry, 2002 The fulleride dianions C(60)(2-) and C(70)(2-) were generated by deprotonation of the corresponding hydrogenated fullerenes, 1,2-C(60)H(2) and 1,2-C(70)H(2). These anions were prepared in the presence of a variety of alkylating agents, and mono- or dialkylated products were obtained. Alkylation was not successful with sulfonate ester alkylating agents.
Mark S, Meier +4 more
openaire +2 more sources
Room-Temperature, Base-Mediated Selective Synthesis of 2-(Arylamino)ethanols and 2-Aryloxyethanols
SynOpen, 2019 A simple and efficient protocol for base-mediated selective synthesis of 2-(arylamino)ethanols from primary aromatic amines and 2-aryloxyethanols from phenols, promoted by K2CO3 has been achieved under mild conditions.
Rahul B. Sonawane +3 more
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Chemical, Electronic, and Electrical Properties of Alkylated Ge(111) Surfaces [PDF]
, 2010 The use of Ge in semiconductor electronics has been constrained by the lack of a simple method of passivating the crystal surface. Toward that end, we have explored the utility of chemically bonded hydrocarbon monolayers.
Brunschwig, Bruce S. +2 more
core +2 more sources