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130814-73-2

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130814-73-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 130814-73-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,0,8,1 and 4 respectively; the second part has 2 digits, 7 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 130814-73:
(8*1)+(7*3)+(6*0)+(5*8)+(4*1)+(3*4)+(2*7)+(1*3)=102
102 % 10 = 2
So 130814-73-2 is a valid CAS Registry Number.

130814-73-2Relevant articles and documents

Asymmetric Diels-Alder Reactions with Chiral 2-Methyl-1-(1-arylethoxy)-1,3-butadienes

Rieger, Rainer,Breitmaier, Eberhard

, p. 697 - 701 (1990)

Chiral 1-arylethanols 2, prepared by enantioselective reduction of phenones 1 with lithium aluminium hydride and Chirald , are converted to the chiral 2-methyl-1-(1-arylethoxy)-1,3-butadienes 5 by vinylogous transesterification with 2-methyl-1-ethoxyacrolein (3) and subsequent Wittig methylenation of the intermediate chiral 3-(1-arylethoxy)-2-methylacroleins 4.The 1-arylethyl isoprenyl ethers 5 undergo cycloadditions as donor-activated 1,3-dienes with numerous electron-deficient dienophiles in good chemical yields and high diastereomeric excesses (>/= 95percent).The chiral inductor is removed optically pure from the cycloadducts by hydrogen chloride and silica gel in dichloromethane suspension at room temperature.

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