100420-33-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 100420-33-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,0,4,2 and 0 respectively; the second part has 2 digits, 3 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 100420-33:
(8*1)+(7*0)+(6*0)+(5*4)+(4*2)+(3*0)+(2*3)+(1*3)=45
45 % 10 = 5
So 100420-33-5 is a valid CAS Registry Number.
100420-33-5Relevant articles and documents
NOVEL NAZAROV-TYPE CYCLIZATION OF TETRAHYDRO-4-OXOPYRAN-3-CARBOXYLIC ESTERS BY THE USE OF Me3SiCl-NaI REAGENT
Sakai, Takashi,Miyata, Kazuyoshi,Takeda, Akira
, p. 1137 - 1138 (2007/10/02)
Treatment of 2,5,6-tri-substituted tetrahydro-4-oxopyran-3-carboxylic esters with Me3SiCl-NaI reagent in DMF at 120 deg C gave cyclopentenone derivatives via the Nazarov-type cyclization subsequent to possible dehydration.
