214421-52-0 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 214421-52-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,4,4,2 and 1 respectively; the second part has 2 digits, 5 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 214421-52:
(8*2)+(7*1)+(6*4)+(5*4)+(4*2)+(3*1)+(2*5)+(1*2)=90
90 % 10 = 0
So 214421-52-0 is a valid CAS Registry Number.
214421-52-0Relevant articles and documents
Total synthesis of manoalide
Coombs,Lattmann,Hoffmann
, p. 1367 - 1371 (1998)
Me3Al/AlCl3-mediated hetero-Diels-Alder (HDA) additions of 2-silyloxy-1,3-dienes to formylated butenolide 6 containing a protected hydroxy function afford, in one step, a variety of pyranofuranones including manoalide precursor 16, which is a stable monoprotected seco-manoalide.