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1000789-20-7

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1000789-20-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1000789-20-7 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,0,0,0,7,8 and 9 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 1000789-20:
(9*1)+(8*0)+(7*0)+(6*0)+(5*7)+(4*8)+(3*9)+(2*2)+(1*0)=107
107 % 10 = 7
So 1000789-20-7 is a valid CAS Registry Number.

1000789-20-7Relevant articles and documents

5-Exo versus 6-Endo cyclization of primary aminyl radicals: An experimental and theoretical investigation

Liu, Feng,Liu, Kun,Yuan, Xinting,Li, Chaozhong

, p. 10231 - 10234 (2008/09/17)

(Chemical Equation Presented) The cyclization of neutral primary pent-4-enylaminyl radicals was investigated experimentally and theoretically. Unlike the corresponding secondary aminyl radicals, primary pent-4-enylaminyl radicals underwent efficient cyclization to afford the pyrrolidine and/or piperidine products in good to high yields. While the simple pent-4-enylaminyl radical gave predominately the 5-exo cyclization product, 4-chloropent-4- enylaminyl radicals led to the formation of the corresponding 6-endo cyclization products in excellent regioselectivity. Theoretical calculations revealed that the 5-exo cyclization rate of primary aminyl radicals is about 3-4 orders of magnitude higher than that of secondary aminyl radicals.

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