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211491-49-5

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211491-49-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 211491-49-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,1,4,9 and 1 respectively; the second part has 2 digits, 4 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 211491-49:
(8*2)+(7*1)+(6*1)+(5*4)+(4*9)+(3*1)+(2*4)+(1*9)=105
105 % 10 = 5
So 211491-49-5 is a valid CAS Registry Number.

211491-49-5Upstream product

211491-49-5Downstream Products

211491-49-5Relevant articles and documents

Total synthesis of methyl sarcophytoate, a marine natural biscembranoid

Ichige, Takahiro,Okano, Yusuke,Kanoh, Naoki,Nakata, Masaya

scheme or table, p. 230 - 243 (2009/04/18)

(Chemical Equation Presented) The total synthesis of methyl sarcophytoate (1), a marine natural biscembranoid, has been achieved by the thermal Diels-Alder reaction between the 14-membered dienophile unit, methyl sarcoate (2), and the 14-membered diene unit 64. Methyl sarcoate (2) was prepared using n-BuLi-Bu2Mg-mediated dithiane coupling, Kosugi-Migita-Stille coupling, and Grubbs ring-closing metathesis. The diene unit 64 was prepared using Sharpless asymmetric epoxidation, Grubbs ring-closing metathesis, 6-exo-tet epoxide opening, and n-BuLi-Bu2Mg-mediated Ito-Kodama cyclization. The final Diels-Alder reaction between 2 and 64 proceeded with high site, endo/exo, π-face, and regioselectivities. During this reaction, partial E → Z isomerization at the C4 position was observed.

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