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204980-73-4

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204980-73-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 204980-73-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,4,9,8 and 0 respectively; the second part has 2 digits, 7 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 204980-73:
(8*2)+(7*0)+(6*4)+(5*9)+(4*8)+(3*0)+(2*7)+(1*3)=134
134 % 10 = 4
So 204980-73-4 is a valid CAS Registry Number.

204980-73-4Relevant articles and documents

Synthesis using Suzuki cross couplings of sulfur analogues of dehydrotryptophan with a definite stereochemistry

Silva, Natalia O.,Abreu, Ana S.,Ferreira, Paula M. T.,Monteiro, Luis S.,Queiroz, Maria-Joao R. P.

, p. 2524 - 2528 (2002)

Sulfur analogues of dehydrotryptophan (5-7) were prepared in moderate to good yields (40-80%) by Suzuki cross coupling [Pd(PPh3)4, Na2CO3 or NaHCO3, DME/H2O, 90°C] of several benzo[b]thioph

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