252040-47-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 252040-47-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,5,2,0,4 and 0 respectively; the second part has 2 digits, 4 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 252040-47:
(8*2)+(7*5)+(6*2)+(5*0)+(4*4)+(3*0)+(2*4)+(1*7)=94
94 % 10 = 4
So 252040-47-4 is a valid CAS Registry Number.
252040-47-4Relevant articles and documents
STEREOSELECTIVE CONDENSATIONS OF α'-LITHIO PYRROLIDINE AMIDINES
Sanner, Mark A.
, p. 1909 - 1912 (2007/10/02)
The condensation of α'-lithio pyrrolidine amidine 5 with aromatic aldehydes gives hydroxymethyl pyrrolidines 6 with high threo-erythro selectivity (ca. 95:5).In contrast, the analogous reaction with lithiopiperidine amidine 9 is stereorandom.
