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1589590-44-2

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1589590-44-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1589590-44-2 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,5,8,9,5,9 and 0 respectively; the second part has 2 digits, 4 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 1589590-44:
(9*1)+(8*5)+(7*8)+(6*9)+(5*5)+(4*9)+(3*0)+(2*4)+(1*4)=232
232 % 10 = 2
So 1589590-44-2 is a valid CAS Registry Number.

1589590-44-2Relevant articles and documents

Total synthesis of (±)-cafestol: A late-stage construction of the furan ring inspired by a biosynthesis strategy

Zhu, Lili,Luo, Jisheng,Hong, Ran

supporting information, p. 2162 - 2165 (2014/05/06)

An efficient bioinspired approach to the total synthesis of (±)-cafestol features a late-stage installation of the furan ring with a mild Au-catalyzed cycloisomerization. The Et2AlCl-promoted aldehyde-ene cyclization and subsequent Friedel-Crafts reaction deliver a requisite tricyclic system in gram scale with high stereo- and regioselectivity. Moreover, a highly stereoselective SmI2-mediated aldehyde-alkene radical cyclization furnishes the key bicyclo[3.2.1]octane skeleton to offer an advanced intermediate for the synthesis of other oxygenated ent-kaurene diterpenoids.

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