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253663-02-4

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253663-02-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 253663-02-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,5,3,6,6 and 3 respectively; the second part has 2 digits, 0 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 253663-02:
(8*2)+(7*5)+(6*3)+(5*6)+(4*6)+(3*3)+(2*0)+(1*2)=134
134 % 10 = 4
So 253663-02-4 is a valid CAS Registry Number.

253663-02-4Upstream product

253663-02-4Relevant articles and documents

Diastereoselective synthesis of α-substituted-γ-butyrolactones of nucleosides via [1,5]-c,h insertion reactions of α-diazomalonates of nucleosides

Lim, Jinsoo,Choo, Dong-Joon,Kim, Yong Hae

, p. 553 - 554 (2007/10/03)

Diastereoselective and regioselective [1,5]-C,H insertion reactions of 2'-deoxy-3'-diazomalonate nucleosides afforded τ-butyrolactones of nucleosides as chiral synthons for the preparation of 2'-C-branched nucleosides.

An effective method for the preparation of optically active polyoxy 8-membered ring enone corresponding to the B ring of taxol

Shiina, Isamu,Shibata, Jun,Imai, Yumiko,Ibuka, Ryoutarou,Fujisawa, Hidehiko,Hachiya, Iwao,Mukaiyama, Teruaki

, p. 1145 - 1146 (2007/10/03)

An effective method for the preparation of 8-membered ring enone 1 in sufficient quantities was developed. First, optically active trialkoxyaldehyde 3 was prepared by diastereoselective dihydroxylation of olefin 7 derived from D-pantolactone. Secondly, 8-

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