Results 101 to 110 of about 8,648 (155)
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Bulletin of the Academy of Sciences of the USSR Division of Chemical Science, 1959
1. A new method of synthesis of substituted α,α-diaminocarboxylic acids was suggested and developed; it starts with α-amino acids and passes through the corresponding oxazolinones and 4-bromooxazolinones; amides 2. A method of synthesis of substituted α,α-diaminocarboxylic acids was suggested; this consists of heating α-hydroxy-α ...
M. M. Shemyakin +2 more
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1. A new method of synthesis of substituted α,α-diaminocarboxylic acids was suggested and developed; it starts with α-amino acids and passes through the corresponding oxazolinones and 4-bromooxazolinones; amides 2. A method of synthesis of substituted α,α-diaminocarboxylic acids was suggested; this consists of heating α-hydroxy-α ...
M. M. Shemyakin +2 more
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Stereoselective Synthesis of α,β-Diamino Nitriles from Amino Acids
Synthesis, 1994α-Amino acids 1 are readily converted into the corresponding N,N-dibenzylamino aldehydes 2 which in turn serve as starting materials for enantiomerically pure α-N,N-dibenzylamino aldimines 5, 6 and 7 having benzyl, tosyl and trimethylsilyl groups, respectively, at the aldimine nitrogen atom. All three classes of chiral aldimines undergo stereoselective
Manfred T. Reetz +4 more
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Synthesis of β,β′-Diamino Acids from α-Amino Acid Derived β-Lactams
Synlett, 2008Ring opening of protected 3-aminoalkyl-substituted azetidin-2-ones with 0-, N-, or S-nucleophiles led to β,β'-diaminocarboxylic esters, amides, and thioesters, respectively. The reaction outcome is improved by addition of catalytic amounts of sodium azide. Reduction of the β-lactam amide moiety led to diamino alcohols.
Podlech, Joachim +2 more
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Addition of allylzinc to α-amino acid-derived imines: synthesis of diamino alcohols by hydroboration
Monatshefte für Chemie - Chemical Monthly, 2010Imines obtained by condensation of Z-protected or Boc-protected α-amino aldehydes with α-amino tert-butyl esters or with O-silyl-protected amino alcohols were reacted with preformed allyl zinc yielding homoallylamines with yields around 50% and selectivities ranging from 50:50 to 90:10.
Virlouvet, M. +3 more
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ChemInform, 1990
AbstractThe stereoselective synthesis of α,γ‐diamino‐β‐hydroxy amino acid derivatives such as (V) having differently protected amino groups is described.
M. T. REETZ, T. + WUENSCH, K. HARMS
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AbstractThe stereoselective synthesis of α,γ‐diamino‐β‐hydroxy amino acid derivatives such as (V) having differently protected amino groups is described.
M. T. REETZ, T. + WUENSCH, K. HARMS
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ChemInform Abstract: Stereoselective Synthesis of α,β‐Diamino Nitriles from Amino Acids.
ChemInform, 1994AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
M. T. REETZ +4 more
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ChemInform Abstract: Synthesis of β,β′‐Diamino Acids from α‐Amino Acid Derived β‐Lactams.
ChemInform, 2008AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Alexander A. Taubinger +2 more
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Bis(amino acid) derivatives of 1,4-diamino-2-butyne that adopt a C2-symmetric turn conformation
Organic & Biomolecular Chemistry, 20051,4-Diamino-2-butyne was prepared from 1,4-dichloro-2-butyne via 1,4-diazido-2-butyne. Bis(amino acid) derivatives of 1,4-diamino-2-butyne having the general structure (Boc-Xxx-NHCH2C[triple bond])2 (Xxx = Ala, Phe and Met) were prepared and examined by 1H NMR spectroscopy.
Timothy P, Curran +2 more
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The Journal of Organic Chemistry, 1994
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Henry-Georges Lombart, William D. Lubell
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AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Henry-Georges Lombart, William D. Lubell
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ChemInform, 2000
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Yue Luo +2 more
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AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Yue Luo +2 more
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