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213899-37-7

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213899-37-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 213899-37-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,3,8,9 and 9 respectively; the second part has 2 digits, 3 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 213899-37:
(8*2)+(7*1)+(6*3)+(5*8)+(4*9)+(3*9)+(2*3)+(1*7)=157
157 % 10 = 7
So 213899-37-7 is a valid CAS Registry Number.

213899-37-7Upstream product

213899-37-7Downstream Products

213899-37-7Relevant articles and documents

Intramolecular stereoselective protonation of aldehyde-derived enolates

Kena-diba, Anastasie,Noll, Claudia,Richter, Michael,Gieseler, Marc Timo,Kalesse, Markus

supporting information; experimental part, p. 8367 - 8369 (2010/12/25)

Picking sides: Asymmetric protonation of the titled compounds poses a most significant challenge and has been addressed by taking advantage of internal protonation and subsequent hemiacetal formation to avoid epimerization (see scheme). The substrates employed in these transformations can be easily accessed through a sequence of vinylogous aldol reactions with subsequent conjugate reductions.

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