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378198-09-5

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378198-09-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 378198-09-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,7,8,1,9 and 8 respectively; the second part has 2 digits, 0 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 378198-09:
(8*3)+(7*7)+(6*8)+(5*1)+(4*9)+(3*8)+(2*0)+(1*9)=195
195 % 10 = 5
So 378198-09-5 is a valid CAS Registry Number.

378198-09-5Upstream product

378198-09-5Relevant articles and documents

Total synthesis and determination of the absolute configuration of coscinosulfate. A new selective inhibitor of Cdc25 protein phosphatase

Poigny,Nouri,Chiaroni,Guyot,Samadi

, p. 7263 - 7269 (2007/10/03)

The first total synthesis of coscinosulfate 1, a metabolite isolated from a sea sponge, starting from (+)-sclareolide 3 is described. The convergent synthesis strategy relies on the coupling of sulfone 21 with the bromide 26. The sulfone fragment 21 was obtained by successive asymmetric aldol reaction with aldehyde 2 to introduce the stereocenters at C-12 and C-13, followed by one-carbon homologation via Horner - Wadsworth - Emmons olefination. The selective sulfatation at C-12 was accomplished through the quinone intermediate 31 obtained by selective oxidation of hydroquinone 30 this, when followed by reduction, furnished the desired coscinosulfate 1. X-ray analysis of the intermediate aldehyde 18 confirmed the proposed stucture.

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