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557796-87-9

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557796-87-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 557796-87-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 5,5,7,7,9 and 6 respectively; the second part has 2 digits, 8 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 557796-87:
(8*5)+(7*5)+(6*7)+(5*7)+(4*9)+(3*6)+(2*8)+(1*7)=229
229 % 10 = 9
So 557796-87-9 is a valid CAS Registry Number.

557796-87-9Relevant articles and documents

Design of N-spiro C2-symmetric chiral quaternary ammonium bromides as novel chiral phase-transfer catalysts: Synthesis and application to practical asymmetric synthesis of α-amino acids

Ooi, Takashi,Kameda, Minoru,Maruoka, Keiji

, p. 5139 - 5151 (2007/10/03)

A series of C2-symmetric chiral quaternary ammonium bromides 10 and 11 have been designed as a new, purely synthetic chiral phase-transfer catalyst, and readily prepared from commercially available optically pure 1,1′-bi-2-naphthol as a basic c

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