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87281-04-7

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87281-04-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 87281-04-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,7,2,8 and 1 respectively; the second part has 2 digits, 0 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 87281-04:
(7*8)+(6*7)+(5*2)+(4*8)+(3*1)+(2*0)+(1*4)=147
147 % 10 = 7
So 87281-04-7 is a valid CAS Registry Number.

87281-04-7Relevant articles and documents

N-Formylsaccharin: A new formylating agent

Cochet, Thomas,Bellosta, Véronique,Greiner, Alfred,Roche, Didier,Cossy, Janine

experimental part, p. 1920 - 1922 (2011/10/02)

N-Formylsaccharin, a very cheap reagent, has been revealed to be an efficient and chemoselective formylating agent of amines. Georg Thieme Verlag Stuttgart New York.

ATROPISOMERISM IN POLYMERS. SCREW-SENSE SELECTIVE POLYMERIZATION OF ISOCYANIDES BY INHIBITING THE GROWTH OF ONE ENANTIOMER OF A RACEMIC PAIR OF HELICES.

Kamer,Cleij,Nolte,Harada,Hezemans,Drenth

, p. 1581 - 1587 (2007/10/02)

The authors describe a method for the preparation of a polymer with an excess of either left- or right-handed helices, starting from an achiral isocyanide. To this end, they added a slowly polymerizing optically active isocyanide as comonomer to a rapidly polymerizing achiral isocyanide. CD spectra and optical rotation indicate that the screw sense of the resulting polymer samples is opposite to the one preferred by the homopolymer of the optically active comonomer. A mechanism is proposed according to which the optically active comonomer is preferentially incorporated in one of the two helices formed from the achiral isocyanide, viz. the one that corresponds to its own homopolymer.

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