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479485-03-5

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479485-03-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 479485-03-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,7,9,4,8 and 5 respectively; the second part has 2 digits, 0 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 479485-03:
(8*4)+(7*7)+(6*9)+(5*4)+(4*8)+(3*5)+(2*0)+(1*3)=205
205 % 10 = 5
So 479485-03-5 is a valid CAS Registry Number.

479485-03-5Downstream Products

479485-03-5Relevant articles and documents

Total synthesis of epothilone A through stereospecific epoxidation of the p-methoxybenzyl ether of epothilone C

Liu, Zhi-Yu,Chen, Ze-G,Yu, Cheng-Zhi,Wang, Rui-Fang,Zhang, Ru-Zhou,Huang, Chu-Sheng,Yan, Zheng,Cao, De-Rong,Sun, Jian-Bo,Li, Gang

, p. 3747 - 3756 (2007/10/03)

The total synthesis of epothilone A is described by the coupling four segments 4 - 7a. Three of the segments, 4, 5 and 7a, have only one chiral center; all other chiral centers were introduced by simple asymmetric catalytic reactions. The key steps are the ring opening of epoxide 5 with acetylide 8 for the construction of the C12-C13 cis double bond and a practical hydrolytic kinetic resolution (HKR) developed by Jacobsen group for the introduction the chiral center at C3. Especially, the stereospecific epoxidation of 3-O-PMB epothilone C 3b through long-range effect of 3-O-PMB protecting group gave high yields of the C12 - C13 α-epoxide for the synthesis of target molecule.

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