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13689-18-4

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13689-18-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 13689-18-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,3,6,8 and 9 respectively; the second part has 2 digits, 1 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 13689-18:
(7*1)+(6*3)+(5*6)+(4*8)+(3*9)+(2*1)+(1*8)=124
124 % 10 = 4
So 13689-18-4 is a valid CAS Registry Number.

13689-18-4Downstream Products

13689-18-4Relevant academic research and scientific papers

The reactivity of arylphosphine oxides under Bouveault-Blanc reaction conditions

Korzeniowska, Ewelina,Kozio?, Anna E.,?astawiecka, El?bieta,Flis, Anna,Stankevi?, Marek

, p. 5153 - 5162 (2017)

Treatment of tertiary arylphosphine oxides with alkali metal/alcohol reagent system lead to the corresponding cyclohexyl-substituted phosphine oxides. This transformation makes use of the inexpensive sodium as the electron donor and an alcohol as the proton source, and provides an attractive alternative to reactions mediated by expensive transition metals. Under optimized conditions numerous mono- and diaryl substituted phosphine oxides were transformed into the corresponding mono- and dicyclohexyl-substituted phosphine oxides in good yields. Furthermore, the formation of 1,2-bis(phosphinoyl)cyclohexanes or unknown 5,10-dialkyltetradecahydrophosphanthrene 5,10-dioxides as side products was observed, which are hardly accessible by other procedures.

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