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161688-97-7

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161688-97-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 161688-97-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,6,1,6,8 and 8 respectively; the second part has 2 digits, 9 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 161688-97:
(8*1)+(7*6)+(6*1)+(5*6)+(4*8)+(3*8)+(2*9)+(1*7)=167
167 % 10 = 7
So 161688-97-7 is a valid CAS Registry Number.

161688-97-7Relevant articles and documents

Enantioselective Synthesis of β-Amino Acids. 5. Stereoselective Reaction of Chiral Pyrimidinone Enolates with Aldehydes

Murer, Peter,Rheiner, Beat,Juaristi, Eusebio,Seebach, Dieter

, p. 319 - 344 (2007/10/02)

Hydro-pyrimidinones ((2S,6R)-3) and ((2S)-6) were prepared from methyl crotonate via 3-aminobutanoate, and their corresponding lithium enolate and dienolate derivatives were added to various aldehydes.The high regio- and stereoselectivities observed in these aldol reactions pave the road for the preparation of enantiomerically pure β-hydroxy-β'-amino acids.The structures of the products were confirmed by X-ray crystal structure analysis (eight examples).

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