141643-08-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 141643-08-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,1,6,4 and 3 respectively; the second part has 2 digits, 0 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 141643-08:
(8*1)+(7*4)+(6*1)+(5*6)+(4*4)+(3*3)+(2*0)+(1*8)=105
105 % 10 = 5
So 141643-08-5 is a valid CAS Registry Number.
141643-08-5Relevant articles and documents
Asymmetric 1,4-additions to γ-menthyloxybutenolides. Part IV. Two enantioselective syntheses of 2-methyl-1,4-butanediol
Jansen,Feringa
, p. 1367 - 1376 (1992)
Based on the asymmetric Michael addition to 5(R)- and 5(S)-menthyloxy-2[5H]-furanone two new syntheses of enantiomerically pure R- and S-2-methyl-1,4-butanediol are described.