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88099-49-4

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88099-49-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 88099-49-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,8,0,9 and 9 respectively; the second part has 2 digits, 4 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 88099-49:
(7*8)+(6*8)+(5*0)+(4*9)+(3*9)+(2*4)+(1*9)=184
184 % 10 = 4
So 88099-49-4 is a valid CAS Registry Number.

88099-49-4Relevant articles and documents

Stereoselective Introduction of Hydroxy Groups into the Cholesterol Side Chain. Preparation of (24R)- and (24S)-24,25-Dihydroxy- and (25R)- and (25S)-25,26-Dihydroxyvitamin D3 by Asymmetric Synthesis

Koizumi, Naoyuki,Ishiguro, Masaji,Yasuda, Mitsuhiro,Ikekawa, Nobuo

, p. 1401 - 1410 (2007/10/02)

24,25-Epoxy-26-hydroxy-3β-tetrahydropyranyloxycholest-5-enes (7a) and (8a), prepared by asymmetric epoxidation of the allylic alcohol (4), and 24-hydroxy-3β-tetrahydropyranyloxycholesta-5,25-dienes (11) and (12), synthesized by asymmetric reduction of the enone (6), were stereoselectively converted into 25,26-and 24,25-dihydroxycholesterol derivatives, which could be transformed into 25,26- and 24,25-dihydroxyvitamin D3.The highly stereoselective epoxide cleavage of 26-benzoyloxy-24,25-epoxides (7b), (8b), (25), and (26) was found to proceed with retention at C-24.

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