135328-41-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 135328-41-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,5,3,2 and 8 respectively; the second part has 2 digits, 4 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 135328-41:
(8*1)+(7*3)+(6*5)+(5*3)+(4*2)+(3*8)+(2*4)+(1*1)=115
115 % 10 = 5
So 135328-41-5 is a valid CAS Registry Number.
135328-41-5Relevant academic research and scientific papers
Synthesis of 2-Aryl-3-hydroxy-4,9-dihydrocycloheptapyran-4,9-diones
Jin, Young-Zhi,Jin, Zhong-Tian,Imafuku, Kimiaki
, p. 817 - 818 (2007/10/02)
3-(2-Bromoacetyl)tropolone (1) reacted with benzaldehydes 2a-g in the presence of alkali at low temperature to give 2-aryl-3-hydroxy-4,9-dihydrocycloheptapyran-4,9-diones 3a-g in good yields.
