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910223-93-7

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910223-93-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 910223-93-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 9,1,0,2,2 and 3 respectively; the second part has 2 digits, 9 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 910223-93:
(8*9)+(7*1)+(6*0)+(5*2)+(4*2)+(3*3)+(2*9)+(1*3)=127
127 % 10 = 7
So 910223-93-7 is a valid CAS Registry Number.

910223-93-7Relevant articles and documents

Dibenzo-fused seven-membered nitrogen heterocycles by a tandem reduction-lactamization reaction

Bunce, Richard A.,Schammerhorn, James E.

, p. 1031 - 1035 (2006)

Efficient syntheses of dibenz[b,f][1,4]oxazepin-11(10H)-one, 5,10-dihydro-11H-dibenzo[b,e][1,4]-diazepin-11-one and 5,11-dihydro-6H-dibenz[b, e]azepin-6-one are described using a tandem reduction-lactamization sequence. Precursors for these ring systems are available in 1-3 steps using nucleophilic aromatic substitution and Ullmann coupling methodology. Direct reduction-lactamization of these compounds using iron powder in acetic acid at 115° affords the target heterocycles in ≥90% yield.

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