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438620-29-2

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438620-29-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 438620-29-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,3,8,6,2 and 0 respectively; the second part has 2 digits, 2 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 438620-29:
(8*4)+(7*3)+(6*8)+(5*6)+(4*2)+(3*0)+(2*2)+(1*9)=152
152 % 10 = 2
So 438620-29-2 is a valid CAS Registry Number.

438620-29-2Relevant articles and documents

Addition of chiral enolates to N-alkyl-3-acylpyridinium salts. Total synthesis of (+)-16-epivinoxine and (-)-vinoxine

Bennasar, M.-Llusa,Zulaica, Ester,Alonso, Yolanda,Vidal, Bernat,Vazquez, Jesus T.,Bosch, Joan

, p. 95 - 106 (2007/10/03)

Chiral enolates of indolylacetyl derivatives 6a-f undergo addition to pyridinium salt 7 with complete trans-selectivity and varied diastereofacial selectivities to give, after acid-induced cyclization of the intermediate 1,4-dihydropyridines, the vinoxine-related tetracycles 8a-f. Starting from (S)-prolinol indolylacetamide 6e, subsequent elaboration of the ethylidene substituent from tetracycle 8e and removal of the chiral auxiliary has resulted in a straightforward synthesis of (+)-16-epivinoxine and (-)-vinoxine.

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