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208177-33-7

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208177-33-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 208177-33-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,8,1,7 and 7 respectively; the second part has 2 digits, 3 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 208177-33:
(8*2)+(7*0)+(6*8)+(5*1)+(4*7)+(3*7)+(2*3)+(1*3)=127
127 % 10 = 7
So 208177-33-7 is a valid CAS Registry Number.

208177-33-7Downstream Products

208177-33-7Relevant articles and documents

Umpoled Vilsmeier reagents. The chemistry of aminochlorocarbenes derived from Vilsmeier reagents by the action of bases

Cheng, Ying,Goon, Simon,Meth-Cohn, Otto

, p. 1619 - 1625 (2007/10/03)

Vilsmeier reagents such as N-methyl-N-phenylchloroiminium chloride are readily deprotonated by tert-amines even in POCl3 solution. The resulting transient intermediates, aminochlorocarbenes, are nucleophilic (i.e. umpoled Vilsmeier reagents) and are trapped with electrophiles. In this way dimers [1,2-bis(N-methylanilino)-1,2-dichloroethanes] 3, 'trimers' (indolo[3,2-b]quinolininium chlorides) 4 and 5, 'tetramers' (2,2′-bis-indoles) 11 and isatins 9 and 10 are accessible in one-pot processes from the formanilide.

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