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178943-94-7

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178943-94-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 178943-94-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,8,9,4 and 3 respectively; the second part has 2 digits, 9 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 178943-94:
(8*1)+(7*7)+(6*8)+(5*9)+(4*4)+(3*3)+(2*9)+(1*4)=197
197 % 10 = 7
So 178943-94-7 is a valid CAS Registry Number.

178943-94-7Relevant articles and documents

One-pot conversion of azides to Boc-protected amines with trimethylphosphine and Boc-ON

Ariza, Xavier,Urpi, Felix,Viladomat, Carles,Vilarrasa, Jaume

, p. 9101 - 9102 (1998)

Reaction of azides with trimethylphosphine followed by addition of 2- (tert-butoxycarbonyloxyimino)-2-phenyl-acetonitrile (Boc-ON) at -20°C and stirring at r.t. for 5 h affords the desired Boc-amines in 87-100% yields. Similar types are obtained by mixing

A practical procedure for the preparation of carbamates from azides

Ariza, Xavier,Urpi, Felix,Vilarrasa, Jaume

, p. 7515 - 7517 (2007/10/03)

A practical procedure for the direct conversion of azides to carbamates has been found. High yields are obtained when primary and secondary aliphatic azides, as well as α-azido esters, are treated in THF with Me3P and several chloroformates (ClCOOBn, ClCOOMe, ClCOOEt, ClCOOCH2CCl3, ClCOOCH2CH=CH2).

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