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474003-61-7

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474003-61-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 474003-61-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,7,4,0,0 and 3 respectively; the second part has 2 digits, 6 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 474003-61:
(8*4)+(7*7)+(6*4)+(5*0)+(4*0)+(3*3)+(2*6)+(1*1)=127
127 % 10 = 7
So 474003-61-7 is a valid CAS Registry Number.

474003-61-7Downstream Products

474003-61-7Relevant articles and documents

Intramolecular cycloaddition of O-tert-butyldimethylsilyloximes in the presence of BF3-OEt2

Tamura, Osamu,Mitsuya, Takahiro,Huang, Xin,Tsutsumi, Yoshiyuki,Hattori, Sanae,Ishibashi, Hiroyuki

, p. 10720 - 10725 (2007/10/03)

Intramolecular cycloaddition of novel 1,3-dipoles, N-boranonitrones, was examined. Treatment of O-tert-butyldimethylsilyloximes 9-12 having olefin moieties with 2 equiv of BF3·OEt2 generated N-boranonitrones, which underwent intramolecular cycloaddition to afford N-nonsubstituted cycloadducts 16 (and/or 18) after extractive workup. Despite the Lewis-acidic conditions, the olefin geometry of the substrates was retained in the cycloadducts in the present cycloaddition. The electronic nature of the N-boranonitrones appeared to be electrophilic. In the case of substrate 11c, having an electron-donating methyl group at an internal position of the olefin moiety, the cycloaddition gave the bridged cycloadduct 18b. The cycloaddition proceeded at relatively low temperature, and the diastereoselectivity was high.

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