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544444-28-2

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544444-28-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 544444-28-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 5,4,4,4,4 and 4 respectively; the second part has 2 digits, 2 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 544444-28:
(8*5)+(7*4)+(6*4)+(5*4)+(4*4)+(3*4)+(2*2)+(1*8)=152
152 % 10 = 2
So 544444-28-2 is a valid CAS Registry Number.

544444-28-2Relevant articles and documents

Mechanism and applications of lithium amide-induced asymmetric rearrangements of 4-substituted and 4,4-disubstituted cyclopentene oxides to cyclopentenols

Hodgson, David M.,Gibbs, Andrew R.,Drew, Michael G. B.

, p. 3579 - 3590 (2007/10/03)

The preparation and lithium amide-induced rearrangements of 1,2-dideuterated 4-substituted cyclopentene oxides 11 and 19 are described, providing insight into the deprotonation mechanisms operating in such systems. Highly enantioselective syntheses of 4-substituted cis-4-hydroxymethylcyclopent-2-en-1-ols 32a-c are described. Also described are asymmetric syntheses of prostaglandin precursor 40 and (+)-iridomyrmecin (48) via highly enantioselective rearrangement of the epoxide 3 and subsequent Ireland-Claisen rearrangement. The Royal Society of Chemistry 1999.

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