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220475-69-4

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220475-69-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 220475-69-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,0,4,7 and 5 respectively; the second part has 2 digits, 6 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 220475-69:
(8*2)+(7*2)+(6*0)+(5*4)+(4*7)+(3*5)+(2*6)+(1*9)=114
114 % 10 = 4
So 220475-69-4 is a valid CAS Registry Number.

220475-69-4Downstream Products

220475-69-4Relevant articles and documents

N, N′-dioxide-Cu(OTf)2 complex catalyzed highly enantioselective amination reaction of N-acetyl enamide

Chang, Lu,Kuang, Yulong,Qin, Bo,Zhou, Xin,Liu, Xiaohua,Lin, Lili,Feng, Xiaoming

supporting information; experimental part, p. 2214 - 2217 (2010/08/06)

The N,N′-dioxide-Cu(OTf)2 complexes were applied in the asymmetric amination reaction of N-acetyl enamides with dialkyl azodicarboxylate, giving the corresponding products in good yields with high enantioselectivities (up to 91% ee). Precursors of vicinal diamine were readily obtained with excellent diastereoselectivities (>95:5) by NaBH4 reduction.

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