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191422-42-1

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191422-42-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 191422-42-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,1,4,2 and 2 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 191422-42:
(8*1)+(7*9)+(6*1)+(5*4)+(4*2)+(3*2)+(2*4)+(1*2)=121
121 % 10 = 1
So 191422-42-1 is a valid CAS Registry Number.

191422-42-1Downstream Products

191422-42-1Relevant articles and documents

Extremely Efficient Chiral Induction in Conjugate Additions of p-Tolyl α-Lithio-β-(trimethylsilyl)ethyl Sulfoxide and Subsequent Electrophilic Trapping Reactions

Nakamura, Shuichi,Watanabe, Yoshihiko,Toru, Takeshi

, p. 1758 - 1766 (2007/10/03)

Reaction of p-tolyl α-lithio-β-(trimethylsilyl)ethyl sulfoxide with α,β-unsaturated esters gave the conjugate addition products as a single diastereomer. The intermediate enolates were subsequently trapped with various alkyl halides or aldehydes to give the products with extremely high stereoselectivity. The reaction with α,β-unsaturated ketones also proceeded with high diastereoselectivity. Protolysis of the enolates derived from the α-methyl-α,β-unsaturated esters gave the products with high stereoselectivity. The stereo- and regioselective elimination of the sulfinyl group gave chiral homoallylic carboxylates.

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