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180339-33-7

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180339-33-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 180339-33-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,8,0,3,3 and 9 respectively; the second part has 2 digits, 3 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 180339-33:
(8*1)+(7*8)+(6*0)+(5*3)+(4*3)+(3*9)+(2*3)+(1*3)=127
127 % 10 = 7
So 180339-33-7 is a valid CAS Registry Number.

180339-33-7Relevant articles and documents

Addition reactions of acetylenic esters to 6,7-dihydrobenzo[b]furan-4(5H)-one, 6,7-dihydroindol-4(5H)-one, 5,6-dihydrobenzo[b]furan-7(6H)-one and 5,6-dihydroindol-7(6H)-one ketoximes. Formation of reduced furo[g]- and pyrrolo[g]-indoles

Pinna, Gerard Aime,Sechi, Mario,Paglietti, Giuseppe,Pirisi, Maria Antonietta

, p. 362 - 380 (2007/10/03)

Thermal rearrangement of 6,7-dihydrobenzo[b]furan-4(5H)-one and 4,5,6,7-tetrahydroindol-4-one 4(7H)-O-(E)-(1,2-dimethoxycarbonylvinyl)ketoximes gave 4,5-dihydrofuro[2,3-g]- and 4,5-dihydropyrrolo[2,3-g]- and [3,2-g]-indoles, three novel tricyclic systems.

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