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1071842-34-6

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1071842-34-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1071842-34-6 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,0,7,1,8,4 and 2 respectively; the second part has 2 digits, 3 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 1071842-34:
(9*1)+(8*0)+(7*7)+(6*1)+(5*8)+(4*4)+(3*2)+(2*3)+(1*4)=136
136 % 10 = 6
So 1071842-34-6 is a valid CAS Registry Number.

1071842-34-6Downstream Products

1071842-34-6Relevant articles and documents

Vilsmeier-Haack reaction of 1-cyclopropyl-2-arylethanones

Tang, Xiang-Ying,Shi, Min

supporting information; experimental part, p. 8317 - 8320 (2009/04/11)

(Chemical Equation Presented) A convenient and efficient method to synthesize 3-(2-chloroethyl)-5-aryl-4H-pyran-4-ones 2 and 2-chloro-3-(2- chloroethyl)-1-naphthaldehydes 3 in moderate to good yields was developed via the Vilsmeier-Haack reaction of readily available 1-cyclopropyl-2-arylethanones 1 at different temperature. This reaction proceeds via sequential enolization, ring opening, haloformylation, and intramolecular nucleophilic cyclization or Friedel-Crafts alkylation reactions to produce 2 or 3.

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