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91860-00-3

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91860-00-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 91860-00-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,1,8,6 and 0 respectively; the second part has 2 digits, 0 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 91860-00:
(7*9)+(6*1)+(5*8)+(4*6)+(3*0)+(2*0)+(1*0)=133
133 % 10 = 3
So 91860-00-3 is a valid CAS Registry Number.

91860-00-3Relevant articles and documents

Non-metal catalytic method for preparing 1,3-diketone compounds based on acetyenic ketone

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Paragraph 0031; 0032; 0034; 0036; 0037, (2020/02/19)

The invention discloses a non-metal catalytic method for preparing 1,3-diketone compounds based on acetyenic ketone. The preparation method is a stepwise method or a one-pot method. The stepwise method comprises the following steps: mixing an acetyenic ketone compound I, a nitrogen-containing aromatic compound II and a No.1 base for a reaction, performing separation and purification to obtain an intermediate product, mixing the intermediate product and a No.2 base for a reaction, and performing separation and purification to obtain the product; and the one-pot method comprises the following steps: firstly mixing an acetyenic ketone compound I and a nitrogen-containing aromatic compound II, adding a No.1 base, performing a reaction for a period of time, adding a No.2 base, continuing a reaction for a period of time, and finally performing separation and purification to obtain the product. The method provided by the invention has mild reaction conditions, simple operation and a higher yield, wherein the yield is generally 80% or more, and the method has greater practical application value in drug synthesis.

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