20662-87-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 20662-87-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,6,6 and 2 respectively; the second part has 2 digits, 8 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 20662-87:
(7*2)+(6*0)+(5*6)+(4*6)+(3*2)+(2*8)+(1*7)=97
97 % 10 = 7
So 20662-87-7 is a valid CAS Registry Number.
20662-87-7Relevant articles and documents
Tungsten and molybdenum catalyst-mediated cyclisation of N-propargyl amides
Meng, Xiangjian,Kim, Sunggak
, p. 4429 - 4431 (2011/07/29)
Tungsten and molybdenum catalysts were employed to promote the cyclisation of N-propargylic amides to afford the corresponding oxazolines or oxazines via 5-exo-dig or 6-endo-dig mode.