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69373-87-1

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69373-87-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 69373-87-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,9,3,7 and 3 respectively; the second part has 2 digits, 8 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 69373-87:
(7*6)+(6*9)+(5*3)+(4*7)+(3*3)+(2*8)+(1*7)=171
171 % 10 = 1
So 69373-87-1 is a valid CAS Registry Number.

69373-87-1Relevant articles and documents

Novel method for preparing drotaverine hydrochloride intermediate

-

, (2020/06/16)

The invention discloses a novel method for preparing a drotaverine hydrochloride intermediate, belonging to the technical field of medicine synthesis. The preparation method comprises the following steps: preparing an intermediate 3,4-diethoxyphenylacetic acid with 1,2-diethoxybenzene as a raw material, and preparing the intermediate 3,4-diethoxyphenylacetamide with 3,4-diethoxyphenylacetic acid as a raw material. According to the novel process for preparing the drotaverine hydrochloride intermediate, a method for directly preparing 3,4-diethoxyphenylacetic acid and 3,4-diethoxyphenylethylamine is adopted, and a process for preparing 3,4-diethoxyphenylacetonitrile is avoided, so a reaction step of using sodium cyanide is avoided.

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