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137378-91-7

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137378-91-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 137378-91-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,7,3,7 and 8 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 137378-91:
(8*1)+(7*3)+(6*7)+(5*3)+(4*7)+(3*8)+(2*9)+(1*1)=157
157 % 10 = 7
So 137378-91-7 is a valid CAS Registry Number.

137378-91-7Downstream Products

137378-91-7Relevant articles and documents

Factors Influencing the Regiochemistry of Spiro-oxetane Formation from the Photocycloaddition of Ethenes to 1,4-Benzoquinone

Bryce-Smith, Derek,Evans, Elizabeth H.,Gilbert, Andrew,McNeill, Hilary S.

, p. 1587 - 1593 (2007/10/02)

The photoadditions of a variety of electron donor and electron acceptor ethenes to 1,4-benzoquinone have been studied.Spiro-oxetanes were formed in each case, though at markedly varying rates.The reactions were not stereoselective.In all cases except that of isopropenyl acetate, the regiochemistry observed was the opposite of that predicted from the relative stabilities of the two possible intermediate 1,4-diradicals and from the known corresponding photoadditions to ketones and aldehydes.A mechanism involving control of the regioselectivity by polar factors resulting from initial electron tranfer to the quinone is proposed.

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