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  • 1
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Syntheses with α-Metalated Isocyanides, XLVIII; Phosphorus Analogs of Amino Acids and Peptides, V.  -  Synthesis of 1-Aminoalkylphosphonic Acids by Alkylation of α-Metalated Diethyl IsocyanomethylphosphonateDiethyl 1-isocyanomethylphosphonate (3) can be monoalkylated or bialkylated with alkyl halides (using potassium tert-butoxide or sodium hydride in methylene dichloride as bases). The higher diethyl 1-isocyanoalkylphosphonates 5, on acid hydrolysis, yield either diethyl 1-aminoalkylphosphonates 7 or 1-aminoalkylphosphonic acids 8.  -  1-Amino-1-phenylalkylphosphonic acids 10 are obtained analogously starting from diethyl α-isocyanobenzylphosphonate (9).
    Notes: Isocyanmethylphosphonsäure-diethylester (3) läβt sich baseninduziert (Kalium-tert-butylat oder Natriumhydrid in Methylendichlorid) zu höheren 1-Isocyanalkylphosphonsäure-diethylestern 5 mono- oder dialkylieren. Diese ergeben bei der sauren Hydrolyse wahlweise 1-Aminoalkylphosphonsäure-diethylester 7 oder 1-Aminoalkylphosphonsäuren 8.  -  Analog lassen sich aus α-Isocyanbenzylphosphonsäure-diethylester (9) unter Kettenverlängerung 1-Amino-1-phenylalkylphosphonsäuren (10) synthetisieren.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
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