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175879-98-8

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175879-98-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 175879-98-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,5,8,7 and 9 respectively; the second part has 2 digits, 9 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 175879-98:
(8*1)+(7*7)+(6*5)+(5*8)+(4*7)+(3*9)+(2*9)+(1*8)=208
208 % 10 = 8
So 175879-98-8 is a valid CAS Registry Number.

175879-98-8Downstream Products

175879-98-8Relevant articles and documents

Modulating steric effects in diastereoselective Staudinger reaction: Synthesis of optically pure cis-β-lactams

Jayaraman,Srirajan,Deshmukh,Bhawal

, p. 3741 - 3756 (2007/10/03)

Diastereoselection in the synthesis of β-lactams (14 and 15) via ketene-imine cycloaddition (Staudinger reaction) using different chiral auxiliaries has been examined. While sterically demanding imines derived from bicyclic aldehyde (1) with a β chiral centre provided excellent selectivity, use of imines derived from bicyclic aldehyde (17) with a γ chiral centre was not effective. Improvement of stereoselectivity was also sought using imines (6 and 7) derived from chiral amines (2d,e) and chiral aldehyde (1). The bicyclic terpenoid skeleton of the chiral auxiliary in 1 was dismantled by ruthenium tetroxide oxidation to given multiply functionalized β-lactams-23a-d in good yield.

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