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137776-67-1

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137776-67-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 137776-67-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,7,7,7 and 6 respectively; the second part has 2 digits, 6 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 137776-67:
(8*1)+(7*3)+(6*7)+(5*7)+(4*7)+(3*6)+(2*6)+(1*7)=171
171 % 10 = 1
So 137776-67-1 is a valid CAS Registry Number.

137776-67-1Downstream Products

137776-67-1Relevant articles and documents

3-BROMO-2-PYRONE: AN EASILY PREPARED CHAMELEON DIENE AND A SYNTHETIC EQUIVALENT OF 2-PYRONE IN THERMAL DIELS-ALDER CYCLOADDITIONS

Posner, Gary H.,Nelson, Todd D.,Kinter, Chris M.,Afarinkia, Kamyar

, p. 5295 - 5298 (1991)

3-Bromo-2-pyrone, a stable solid prepared by a new route (eq. 1), has been found to undergo smooth and regiospecific 2+4-cycloadditions between 78-90 deg C with both electron-rich and electron-deficient dienophiles; subsequent high-yield reductive debromi

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