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  • Articles  (2)
  • Halogen exchange, in pyrimidines  (1)
  • Secondary 11N37, 11A25, 43A60  (1)
  • Springer  (2)
  • American Institute of Physics (AIP)
  • Wiley-Blackwell
  • 1985-1989  (2)
  • 1965-1969
Collection
  • Articles  (2)
Keywords
Publisher
  • Springer  (2)
  • American Institute of Physics (AIP)
  • Wiley-Blackwell
Years
  • 1985-1989  (2)
  • 1965-1969
Year
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Monatshefte für Chemie 117 (1986), S. 385-392 
    ISSN: 1434-4475
    Keywords: Halogen exchange, in pyrimidines ; Pyrimidines, 5-ethylsulfonyl-methyl- ; Pyrimidines ; 5-ethylthiomethyl-
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract In 2,4-dichloro-5-ethylthiomethylpyrimidines3a, b and in (2,4-dichloro-5-pyrimidinylmethyl)ethyl sulfones5a, b, resp., by reaction with ammonia, diethyl-amine, isopropylamine, sodium methanolate and sodium ethylthiolate, resp., the halogen atoms have been substituted by amino, methoxy or ethylthio groups, resp., and thus the compounds4a–4r and5c–5f have been obtained.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Aequationes mathematicae 35 (1988), S. 132-139 
    ISSN: 1420-8903
    Keywords: Primary 11K65 ; Secondary 11N37, 11A25, 43A60
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract Still another proof is given for Parseval's well-known equation $$\sum\limits_{1 \leqslant r〈 \infty } {|a_r |^2 \cdot \varphi (r) = \parallel f\parallel \begin{array}{*{20}c} 2 \\ 2 \\ \end{array} } $$ forB 2-almost-even arithmetical functionsf with Ramanujan coefficients $$a_r = \frac{1}{{\varphi (r)}} \cdot M(f \cdot c_r )$$ . An explicit “best approximation” off by even functions, constructed from characteristic functions of subsets {n; g.c.d.(n, r) =k} ⊂ $$\underset{\raise0.3em\hbox{$\smash{\scriptscriptstyle\cdot}$}}{\mathbb{N}} $$ is used.
    Type of Medium: Electronic Resource
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