138223-99-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 138223-99-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,8,2,2 and 3 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 138223-99:
(8*1)+(7*3)+(6*8)+(5*2)+(4*2)+(3*3)+(2*9)+(1*9)=131
131 % 10 = 1
So 138223-99-1 is a valid CAS Registry Number.
138223-99-1Relevant articles and documents
Synthesis of (+/-)-arthrographol
Ayer, William A.,Craw, Peter A.
, p. 1909 - 1916 (2007/10/02)
A total synthesis of (+/-)-arthrographol (1) in seven steps from vanillin is reported.Key steps in the synthesis are a single-step conversion of 5-allylvanillin (2) into the benzofuranmethanol 6, alkylation of the chloride 25 with the lithium anion of cro
