128683-67-0 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 128683-67-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,8,6,8 and 3 respectively; the second part has 2 digits, 6 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 128683-67:
(8*1)+(7*2)+(6*8)+(5*6)+(4*8)+(3*3)+(2*6)+(1*7)=160
160 % 10 = 0
So 128683-67-0 is a valid CAS Registry Number.
128683-67-0Relevant academic research and scientific papers
Synthesis of Spiroketals: A General Approach
Crimmins, Michael T.,O'Mahony, Rosemary
, p. 5894 - 5900 (2007/10/02)
A general procedure for the synthesis of functionalized spiroketals from lactones is described.Addition of the lithium acetylide of cis-1-methoxy-1-buten-3-yne to lactones followed by a hydration of the acetylene, hydrolysis of the enol ether and cyclizat
