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98050-62-5

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98050-62-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 98050-62-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,8,0,5 and 0 respectively; the second part has 2 digits, 6 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 98050-62:
(7*9)+(6*8)+(5*0)+(4*5)+(3*0)+(2*6)+(1*2)=145
145 % 10 = 5
So 98050-62-5 is a valid CAS Registry Number.

98050-62-5Relevant articles and documents

Synthesis of Novel Dihydropyrimidines and Tetrahydropyrimidines

Cho, Hidetsura,Shima, Keiyuu,Hayashimatsu, Mariko,Ohnaka, Yoshiko,Mizuno, Akira,Takeuchi, Yumi

, p. 4227 - 4230 (2007/10/02)

Condensation of alkyl 2-acetyl-3-aryl-2-propenoate with acetamidine, benzamidine, guanidine, or 1,1-dimethylguanidine followed by dehydration of the resulting compound 2 with p-TsOH or Al2O3 gave 1,4(3,4)-dihydropyrimidine 3.Regioselective alkoxycarbonylation, acylation, and alkylation of compound 3 with alkyl chloroformate, acyl halide, or alkyl halide in the presence of NaH afforded the series of novel N-substituted 3,4-dihydropyrimidines 4, 5, and 6 in good yield.Stereoselective NaBH4 reduction of the 3,4-dihydropyrimidine hydrochloride 4 provided a singlestereoisomer of 1,2,3,4-tetrahydropyrimidine 7 whose stereochemistry was assigned as cis by X-ray crystallographic analysis.Conversely, the same reduction of the HCl salts of 3 or 6 gave a cis-trans mixture of tetrahydropyrimidines 8.

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