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119449-67-1

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119449-67-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 119449-67-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,9,4,4 and 9 respectively; the second part has 2 digits, 6 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 119449-67:
(8*1)+(7*1)+(6*9)+(5*4)+(4*4)+(3*9)+(2*6)+(1*7)=151
151 % 10 = 1
So 119449-67-1 is a valid CAS Registry Number.

119449-67-1Relevant articles and documents

A New Route to Naphthofuran-4,9-diones from Thio-substituted 1,4-Naphthoquinones

Kang, Wen-Bing,Sekiya, Takashi,Toru, Takeshi,Ueno, Yoshio

, p. 441 - 445 (2007/10/02)

Reaction of 2-phenylthio- or 2-ethylthio-1,4-naphthoquinones (1) and (2) with lithium enolates or pyridinium ylides was found to give alkylated 1,4-naphthoquionones (3)-(6) in high yields.Alkylated 1,4-naphthoquinones (5) and (6) were then effectively cyclized to 2-substituted naphthofuran-4,9-diones (8) by action of bromine in acetic acid.

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