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134750-68-8

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134750-68-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 134750-68-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,4,7,5 and 0 respectively; the second part has 2 digits, 6 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 134750-68:
(8*1)+(7*3)+(6*4)+(5*7)+(4*5)+(3*0)+(2*6)+(1*8)=128
128 % 10 = 8
So 134750-68-8 is a valid CAS Registry Number.

134750-68-8Relevant articles and documents

Synthesis and Diels Alder Reactions of (+)-(S)-1-t-Butylsulfonyl-1-p-Tolylsulfinylethene, a New Masked Chiral Ketene Equivalent

Lopez, Rosa,Carretero, Juan Carlos

, p. 93 - 96 (2007/10/02)

Enantiomerically pure (+)-(S)s-1-t-butylsulfonyl-1-p-tolylsulfinylethene (1) was easily prepared in three steps from t-butyl methyl sulfone.The catalyzed Diels-Alder reactions of 1 with cyclopentadiene were highly stereoselective.The major adduct was transformed into (+)-(1R,4R)-dehydronorcamphor and (+)-(1R,4S)-2-t-butylsulfonyl-2,5-norbornadiene.

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