138722-08-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 138722-08-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,8,7,2 and 2 respectively; the second part has 2 digits, 0 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 138722-08:
(8*1)+(7*3)+(6*8)+(5*7)+(4*2)+(3*2)+(2*0)+(1*8)=134
134 % 10 = 4
So 138722-08-4 is a valid CAS Registry Number.
138722-08-4Relevant academic research and scientific papers
Syntheses and Transformations of 2,6-Epoxy-4H-3-benzoxocin-4-ones
Wuensch, Bernhard,Bauschke, Gerd
, p. 345 - 350 (2007/10/02)
Four variations for the preparation of 5 are described: acid-catalyzed cyclisation of the methoxy acid 4a, base-catalyzed lactonisation of the hydroxy ester 6b, DCC-mediated dehydration of the hydroxy acid 6a and PCC oxidation of the hemiacetals 17a and 1
