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157840-15-8

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157840-15-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 157840-15-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,7,8,4 and 0 respectively; the second part has 2 digits, 1 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 157840-15:
(8*1)+(7*5)+(6*7)+(5*8)+(4*4)+(3*0)+(2*1)+(1*5)=148
148 % 10 = 8
So 157840-15-8 is a valid CAS Registry Number.

157840-15-8Downstream Products

157840-15-8Relevant articles and documents

Regio- and Diastereo-Chemically Controlled Photocycloaddition of an Arene and an Alkene Linked by a Chiral Auxiliary

Sugimura, Takashi,Nishiyama, Norio,Tai, Akira,Hakushi, Tadao

, p. 1163 - 1166 (1994)

Intramolecular meta-arene alkene photocycloaddition of 1b, the substrate having a chiral auxiliary as a linking bridge between the arene and the alkene, resulted in high diastereofacial differentiation of the alkene at the addition step and sufficient regiocontrol of the subsequent ring closure step to give a single diastereomer 4.

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