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213686-58-9

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213686-58-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 213686-58-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,3,6,8 and 6 respectively; the second part has 2 digits, 5 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 213686-58:
(8*2)+(7*1)+(6*3)+(5*6)+(4*8)+(3*6)+(2*5)+(1*8)=139
139 % 10 = 9
So 213686-58-9 is a valid CAS Registry Number.

213686-58-9Relevant articles and documents

Investigation of the diastereoselectivity during the addition of an enantiomerically pure (2-lithiophenyl)acetaldehyde acetal to various imines

Wuensch, Bernhard,Nerdinger, Sven

, p. 799 - 800 (1998)

The diastereoselectivity during the addition of the homochiral (2-lithiophenyl)acetaldehyde acetal 1b to various imine components was investigated. The diastereoselectivity could be raised to 84.2% de by addition of 1b to benzylidenanisidine 2h. Removal of the tosyl and the p-methoxyphenyl protective groups of 3c, 4c and 3h/4h succeeded with sodium in liquid ammonia and ammonium cerium(IV) nitrate, respectively, to yield the enantiopure benzhydrylamines 5 and 6.

Asymmetric synthesis of 1-aryl-1,2,3,4-tetrahydroisoquinolines part 1: Addition of chiral phenylacetaldehyde acetals to acylimines

Wuensch, Bernhard,Nerdinger, Sven

, p. 8003 - 8006 (2007/10/02)

The stereoselectivity in the addition of the enantiomerically pure (2-bromophenyl)acetaldehyde acetals 3a-g to the acylimines 4a,b is investigated. Based on this reaction a novel asymmetric synthesis for the 1-phenyl-tetrahydroisoquinoline 8 is elaborated.

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