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1191988-15-4

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1191988-15-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1191988-15-4 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,1,9,1,9,8 and 8 respectively; the second part has 2 digits, 1 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 1191988-15:
(9*1)+(8*1)+(7*9)+(6*1)+(5*9)+(4*8)+(3*8)+(2*1)+(1*5)=194
194 % 10 = 4
So 1191988-15-4 is a valid CAS Registry Number.

1191988-15-4Relevant articles and documents

Cationic gold(I)-mediated intramolecular cyclization of 3-alkyne-1,2-diols and 1-amino-3-alkyn-2-ols: A practical route to furans and pyrroles

Egi, Masahiro,Azechi, Kenji,Akai, Shuji

supporting information; experimental part, p. 5002 - 5005 (2009/12/26)

The intramolecular cyclizations of the 3-alkyne-1,2-diols and the 1-amlno-3-alkyn-2-ols with a low catalyst loading (0.05-0.5 mol %) of (Ph 3P)AuCl - AgNTf2 or (Ph3P)AuCl-AgOTf proceeded at room temperature to provide a variety of substituted furans and pyrroles In excellent yields (85-98% yields). This method Is also fully applicable to the conversion of several dozen grams of the substrate using only 0.05 mol % each of the Au and Ag catalysts.

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