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1228378-57-1

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1228378-57-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1228378-57-1 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,2,8,3,7 and 8 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 1228378-57:
(9*1)+(8*2)+(7*2)+(6*8)+(5*3)+(4*7)+(3*8)+(2*5)+(1*7)=171
171 % 10 = 1
So 1228378-57-1 is a valid CAS Registry Number.

1228378-57-1Upstream product

1228378-57-1Relevant articles and documents

Copper-catalyzed synthesis of azaspirocyclohexadienones from ∝-azido- N -arylamides under an oxygen atmosphere

Chiba, Shunsuke,Zhang, Line,Lee, Jian-Yuan

supporting information; experimental part, p. 7266 - 7267 (2010/08/05)

A copper-catalyzed reaction of ∝-azido-N-arylamides was found to proceed under an oxygen atmosphere to afford azaspirocyclohexadienones. The present transformation is carried out by a sequence of denitrogenative formation of iminyl copper species from ∝-azido-N-arylamides and their imino-cupration with an intramolecular benzene ring on the amido nitrogen followed by consecutive formation of C-O bonds. The preliminary investigation revealed that molecular oxygen is a prerequisite for achieving the present catalytic cyclization and that one of the oxygen atoms of O2 was found to be incorporated into the cyclohexadienone moiety.

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