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1637487-08-1

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1637487-08-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1637487-08-1 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,6,3,7,4,8 and 7 respectively; the second part has 2 digits, 0 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 1637487-08:
(9*1)+(8*6)+(7*3)+(6*7)+(5*4)+(4*8)+(3*7)+(2*0)+(1*8)=201
201 % 10 = 1
So 1637487-08-1 is a valid CAS Registry Number.

1637487-08-1Downstream Products

1637487-08-1Relevant articles and documents

[3,3]-sigmatropic rearrangements of fluorinated allyl (thio)cyanates - A to ol for the synthesis of fluorinated (thio)ureas

Ramb, Daniel C.,Kost, Lisa,Haufe, Günter

, p. 436 - 441 (2014)

The first (thio)cyanate to iso(thio)cyanate rearrangements based on 2-fluoroallylic alcohols are presented. Long-chain 2-fluoroallylic alcohols were converted to corresponding N-unsubstituted carbamates by treatment with trichloroacetyl isocyanate. Dehydration using trifluoroacetic anhydride in the presence of triethylamine formed intermediate allylic cyanates, which immediately underwent sigmatropic rearrangement to fluorinated allyl isocyanates. Without isolation the latter delivered fluorinated ureas by addition of amines. The thiocyanate to isothiocyanate rearrangements started from the same fluorinated allylic alcohols, which were first converted to mesylates. Heating in THF with potassium thiocyanate led to fluorinated allyl isothiocyanates, via [3,3]-sigmatropic rearrangement of intermediate allyl thiocyanates. The formed products were further reacted with amines to fluorinated thioureas. Schweizerische Chemische Gesellschaft.

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