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898237-80-4

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898237-80-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 898237-80-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,9,8,2,3 and 7 respectively; the second part has 2 digits, 8 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 898237-80:
(8*8)+(7*9)+(6*8)+(5*2)+(4*3)+(3*7)+(2*8)+(1*0)=234
234 % 10 = 4
So 898237-80-4 is a valid CAS Registry Number.

898237-80-4Relevant academic research and scientific papers

Anionic cross-coupling reaction of α-metallated alkenyl sulfoximines and alkenyl sulfoximines with cuprates featuring a 1,2-metal-ate rearrangement of sulfoximine-substituted higher order alkenyl cuprates and an α-metallation of alkenyl sulfoximines by cuprates

Gais, Hans-Joachim,Rao, C. Venkateshwar,Loo, Ralf

, p. 6510 - 6528 (2008)

(E)- and (Z)-configured αlithioalkenyl sulfoximines, which are available through lithiation of the corresponding alkenyl sulfoximines, undergo a anionic cross-coupling reaction (ACCR) with organocuprates with formation of the corresponding alkenyl cuprates and sulfinamide. The alkenyl cuprates can be trapped by electrophiles. The ACCR presumably proceeds via the formation of a higher-order sulfoximine-substituted alkenyl cuprate, which undergoes a 1,2-metalate rearrangement whereby the sulfoximine group acts as the nucleofuge. The parent (E)- and (Z)-configured alkenyl sulfoximines suffer upon treatment with an organocuprate a deprotonation at the α-position with formation of the corresponding α-cuprioalkenyl sulfoximines. These derivatives also enter into a similar ACCR with organocuprates. The ACCR of sulfoximines substituted homoallylic alcohols allows a stereoselective access to enantio- and diastereopure substituted homoallylic alcohols.

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