Results 191 to 200 of about 64,700 (251)
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ChemInform, 2006
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
I. A. Larionova +2 more
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AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
I. A. Larionova +2 more
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The Alkylating Properties of Alkyl Thiophosphates
Angewandte Chemie International Edition in English, 1965AbstractThiophosphate and phosphate esters have been synthesized in great variety since about 1945, and are being produced in increasing quantities, mainly for plant protection. An important property of alkyl phosphates and thiophosphates is their alkylating power, which is comparable with that of dialkyl sulfates and alkyl p‐toluenesulfonates.
G. Hilgetag, H. Teichmann
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Current Opinion in Chemical Biology, 2013
Chemospecific and regiospecific modifications of natural products by methyl, prenyl, or C-glycosyl moieties are a challenging and cumbersome task in organic synthesis. Because of the availability of an increasing number of stable and selective transferases and cofactor regeneration processes, enzyme-assisted strategies turn out to be promising ...
Ludger A Wessjohann +3 more
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Chemospecific and regiospecific modifications of natural products by methyl, prenyl, or C-glycosyl moieties are a challenging and cumbersome task in organic synthesis. Because of the availability of an increasing number of stable and selective transferases and cofactor regeneration processes, enzyme-assisted strategies turn out to be promising ...
Ludger A Wessjohann +3 more
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Reductive alkyl–alkyl coupling from isolable nickel–alkyl complexes
NatureThe selective cross-coupling of two alkyl electrophiles to construct complex molecules remains a challenge in organic synthesis1,2. Known reactions are optimized for specific electrophiles and are not amenable to interchangeably varying electrophilic substrates that are sourced from common alkyl building blocks, such as amines, carboxylic acids and ...
Samir Al Zubaydi +7 more
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Journal of the American Chemical Society, 2018
By substituting an ER3- unit (E = Group 13 element) or E'R3+ (E' = Group 15 element) for CR3 one gets to methyl isosteres, compounds analogous to alkyls and isoelectronic or iso-valence-electronic to them. The substituent charge can be used to stabilize countercharged aromatic systems; some compounds of this type are known.
Priyakumari Chakkingal Parambil +1 more
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By substituting an ER3- unit (E = Group 13 element) or E'R3+ (E' = Group 15 element) for CR3 one gets to methyl isosteres, compounds analogous to alkyls and isoelectronic or iso-valence-electronic to them. The substituent charge can be used to stabilize countercharged aromatic systems; some compounds of this type are known.
Priyakumari Chakkingal Parambil +1 more
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Dermatitis®, 2017
Alkyl glucosides are surfactants synthesized through the condensation of long-chain fatty alcohols and glucose, extracted from vegetal, renewable sources. Although available for more than 4 decades, they have been rediscovered in recent years because of their eco-friendly character.
Maisa, Alfalah +2 more
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Alkyl glucosides are surfactants synthesized through the condensation of long-chain fatty alcohols and glucose, extracted from vegetal, renewable sources. Although available for more than 4 decades, they have been rediscovered in recent years because of their eco-friendly character.
Maisa, Alfalah +2 more
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Bulletin du cancer, 2011
With the approval of mechlorethamine by the FDA in 1949 for the treatment of hematologic malignancies, alkylating agents are the oldest class of anticancer agents. Even though their clinical use is far beyond the use of new targeted therapies, they still occupy a major place in specific indications and sometimes represent the unique option for the ...
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With the approval of mechlorethamine by the FDA in 1949 for the treatment of hematologic malignancies, alkylating agents are the oldest class of anticancer agents. Even though their clinical use is far beyond the use of new targeted therapies, they still occupy a major place in specific indications and sometimes represent the unique option for the ...
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Solution properties of alkyl glucosides, alkyl thioglucosides and alkyl maltosides
Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2004Abstract Aqueous solutions containing sugar-based surfactants, alkyl glucosides, thioglucosides and maltosides, have been investigated in a wide concentration range, at different temperatures. Colligative properties (freezing point and vapour pressure depression), volumetric, adiabatic compressibility, surface tension and calorimetric methods were ...
Antonio Capalbi +2 more
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Enolate alkylations with alkyl halides
1997This chapter addresses enolate alkylations with alkyl halides. Simple enolates react irreversibly with soft (polarized) electrophiles such as methyl iodide. A new carbon–carbon bond is formed in an SN2, which is of considerable synthetic importance.
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Alkylated steroids from tosylhydrazones and alkyl-lithiums
Journal of the Chemical Society C: Organic, 1971The reaction between 5α-cholestan-3-one tosylhydrazone and alkyl-lithium reagents produces equatorial 3β-alkyl-5α-cholestanes.
J E, Herz, C V, Ortíz
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