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5446-57-1

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5446-57-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 5446-57-1 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 5,4,4 and 6 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 5446-57:
(6*5)+(5*4)+(4*4)+(3*6)+(2*5)+(1*7)=101
101 % 10 = 1
So 5446-57-1 is a valid CAS Registry Number.
InChI:InChI=1/C10H10N2O2/c1-14-8-4-2-7(3-5-8)9(6-11)10(12)13/h2-5,9H,1H3,(H2,12,13)

5446-57-1Relevant articles and documents

Preparation of O-Protected Cyanohydrins by Aerobic Oxidation of α-Substituted Malononitriles in the Presence of Diarylphosphine Oxides

Zhang, Dapeng,Lian, Mingming,Liu, Jia,Tang, Shukun,Liu, Guangzhi,Ma, Cunfei,Meng, Qingwei,Peng, Haisheng,Zhu, Daling

supporting information, p. 2597 - 2601 (2019/04/17)

A mild, reagent-cyanide-free, and efficient synthesis of O-phosphinoyl-protected cyanohydrins from readily available α-substituted malononitriles was realized using diarylphosphine oxides in the presence of O2. Mechanistic studies indicated that in addition to the initial aerobic oxidation of the malononitrile derivative notable features of this process include the formation of a tetrahedral intermediate and a subsequent intramolecular rearrangement. The phosphinoyl-protecting group can be removed by alcoholysis or by reduction with DIBAL-H.

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