118693-22-4 Usage
Uses
6,8-Dichloro-2H-chromene-3-carboxylic acid methyl ester is a product of the sequential Claisen rearrangement of methyl 3-(aryloxy)-2-(aryloxymethyl)-2-propenoates.
Check Digit Verification of cas no
The CAS Registry Mumber 118693-22-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,8,6,9 and 3 respectively; the second part has 2 digits, 2 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 118693-22:
(8*1)+(7*1)+(6*8)+(5*6)+(4*9)+(3*3)+(2*2)+(1*2)=144
144 % 10 = 4
So 118693-22-4 is a valid CAS Registry Number.
118693-22-4Relevant articles and documents
STUDIES ON THE SEQUENTIAL CLAISEN REARRANGEMENT OF METHYL-3-ARYLOXY-2-(ARYLOXYMETHYL)PROP-2-ENOATES
Gopal, D.,Rajagopalan, K.
, p. 5327 - 5330 (2007/10/02)
Claisen rearrangement of methyl-3-aryloxy-2-(aryloxymethyl)prop-2-enoates (4) in refluxing N,N-diethylaniline gave 3-(2-hydroxyphenylmethylene)-3,4-dihydro-2H-1-benzopyran-2-ones (6) and 3-methoxycarbonyl-2H-1-benzopyrans (7).
