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91898-12-3

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91898-12-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 91898-12-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,1,8,9 and 8 respectively; the second part has 2 digits, 1 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 91898-12:
(7*9)+(6*1)+(5*8)+(4*9)+(3*8)+(2*1)+(1*2)=173
173 % 10 = 3
So 91898-12-3 is a valid CAS Registry Number.

91898-12-3Relevant articles and documents

Dimethylboron Bromide and Diphenylboron Bromide: Cleavage of Acetals and Ketals

Guindon, Yvan,Yoakim, Christiane,Morton, Howard E.

, p. 3912 - 3920 (2007/10/02)

The cleavage of various acetal and ketal derivatives by the use of dialkyl- and diarylboron halides is described.Acetals and ketals readily react with dimethylboron bromide or diphenylboron bromide at -78 deg C to give the corresponding carbonyl compounds in excellent yield.Under similar reaction conditions MEM, MOM, and MTM ethers are smoothly converted to alcohols.Acetonides are also cleaved with dimethylboron bromide while THP and THF ethers and methyl glycosides react at room temperature.Mechanistic considerations of the cleavage reactions are presented.The chemoselective virtues of dimethylboron bromide are summarized.

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