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1123890-53-8

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1123890-53-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1123890-53-8 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,1,2,3,8,9 and 0 respectively; the second part has 2 digits, 5 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 1123890-53:
(9*1)+(8*1)+(7*2)+(6*3)+(5*8)+(4*9)+(3*0)+(2*5)+(1*3)=138
138 % 10 = 8
So 1123890-53-8 is a valid CAS Registry Number.

1123890-53-8Relevant articles and documents

Cleavage of tert-butyl benzoates with NaH in DMF: Comments on the mechanism and a simple and safe alternative procedure

Filali, Emane,Lloyd-Jones, Guy C.,Sale, David A.

, p. 205 - 208 (2009)

The hazardous and inconvenient Schmidt procedure for tert-butyl benzoate ester cleavage by NaH in DMF has been reinvestigated. The reaction is suggested to involve BAC2 ester cleavage, facilitated by adventitious, NaH-derived NaOH, rather than the proposed E2 elimination of isobutylene by DMF-derived NaNMe2. Powdered KOH in THF is a significantly safer and simpler alternative that effects cleavage of tert-butyl benozoates, at ambient temperature, in excellent yield (94-99%). Georg Thieme Verlag Stuttgart.

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