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241151-12-2

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241151-12-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 241151-12-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,4,1,1,5 and 1 respectively; the second part has 2 digits, 1 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 241151-12:
(8*2)+(7*4)+(6*1)+(5*1)+(4*5)+(3*1)+(2*1)+(1*2)=82
82 % 10 = 2
So 241151-12-2 is a valid CAS Registry Number.

241151-12-2Downstream Products

241151-12-2Relevant articles and documents

Novel versatile approach to an enantiopure 19-nor, des-C,D vitamin D3 derivative

Hilpert, Hans,Wirz, Beat

, p. 681 - 694 (2007/10/03)

A short and efficient de novo route to the des-C,D vitamin D3 derivative 3 (Ro 65-2299), a potential antipsoriatic, has been developed. This route features an assembly strategy so far unexplored in vitamin D chemistry involving a modified Julia olefination of the A-ring ketone 30 and the 2-benzothiazolyl sulfone 60. Construction of the A-ring building block was accomplished by an efficient three-step route starting from the meso trans-1,3,5-cyclohexane triol (26), which was desymmetrized by a highly selective enzymatic mono-hydrolysis of the corresponding triacetate 27 followed by oxidation of the alcohol 29 to give the homochiral diacetoxy ketone 30 (ee=99.5%) in 83% overall yield. Furthermore, we found efficient and practical syntheses of the 5-acetoxy-2-cyclohexenone (31) and its enantiomer 32, both new building blocks useful for natural product synthesis.

Process for preparing retiferol derivatives

-

, (2008/06/13)

A new process prepares retiferol derivatives of formula I: wherein A is —C ≡C— or —CH═CH—, and R1and R2are independently of each other lower alkyl or lower perfluoroalkyl, one version couples ketones of formula 1I with compounds of f

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