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137958-63-5

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137958-63-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 137958-63-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,7,9,5 and 8 respectively; the second part has 2 digits, 6 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 137958-63:
(8*1)+(7*3)+(6*7)+(5*9)+(4*5)+(3*8)+(2*6)+(1*3)=175
175 % 10 = 5
So 137958-63-5 is a valid CAS Registry Number.

137958-63-5Relevant articles and documents

Oxirane Ring-Opening with Alcohol Catalyzed by Organotin Phosphate Condensates. Complete Inversion at Tertiary and Benzylic Centers

Otera, Junzo,Niibo, Yoshihisa,Nozaki, Hitosi

, p. 7625 - 7634 (2007/10/02)

Regio- and stereospecific ring-opening of chiral oxiranes has been effected by organotin phosphate condensates catalyst.Alcohols attack on the tertiary and benzylic positions exclusively.Despite seemingly acidic character of the catalyst in terms of regioselectivity the chiral centers are completely inverted.The new methodology is applied to synthesis of enantiomerically pure linalool and to conversion of commercially available (R)-styrene oxide into the (S)-counterpart.

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