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74097-67-9

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74097-67-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 74097-67-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,4,0,9 and 7 respectively; the second part has 2 digits, 6 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 74097-67:
(7*7)+(6*4)+(5*0)+(4*9)+(3*7)+(2*6)+(1*7)=149
149 % 10 = 9
So 74097-67-9 is a valid CAS Registry Number.

74097-67-9Relevant articles and documents

Stereoselective synthesis of 3,5-dialkyl-3,5-dihydro-3,5-diphenyl-4H- pyrazol-4-ones

Moiseev, Andrey G.,Neckers, Douglas C.

, p. 2901 - 2905 (2005)

We report stereoselective five-step syntheses of cis-3-ethyl-3,5-dihydro-3, 5-diphenyl-5-methyl-4H-pyrazol-4-one (cis-1b) and trans-3,5-diethyl-3,5-dihydro- 3,5-diphenyl-4H-pyrazol-4-one (trans-1c). The key synthon was 1,3-diphenylpent-2-en-1-one (5b) synthesized in a new one-pot crossed aldol/dehydration reaction of acetophenone with propiophenone using titanium(IV) chloride/tributylamine, followed by treatment with methanesulfonyl chloride and triethylamine. Georg Thieme Verlag Stuttgart.

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