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950598-44-4

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950598-44-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 950598-44-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 9,5,0,5,9 and 8 respectively; the second part has 2 digits, 4 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 950598-44:
(8*9)+(7*5)+(6*0)+(5*5)+(4*9)+(3*8)+(2*4)+(1*4)=204
204 % 10 = 4
So 950598-44-4 is a valid CAS Registry Number.

950598-44-4Relevant articles and documents

Total synthesis of methyl sarcophytoate, a marine natural biscembranoid

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

supporting information; experimental part, 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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