20073-24-9 Usage
General Description
Yellow powder.
Air & Water Reactions
Insoluble in water.
Reactivity Profile
ethyl 7-oxo-7H-furo[3,2-g][1]benzopyran-6-carboxylate is sensitive to exposure to light.
Fire Hazard
Flash point data for ethyl 7-oxo-7H-furo[3,2-g][1]benzopyran-6-carboxylate are not available. ethyl 7-oxo-7H-furo[3,2-g][1]benzopyran-6-carboxylate is probably combustible.
Check Digit Verification of cas no
The CAS Registry Mumber 20073-24-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,0,7 and 3 respectively; the second part has 2 digits, 2 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 20073-24:
(7*2)+(6*0)+(5*0)+(4*7)+(3*3)+(2*2)+(1*4)=59
59 % 10 = 9
So 20073-24-9 is a valid CAS Registry Number.
InChI:InChI=1/C14H10O5/c1-2-17-13(15)10-6-9-5-8-3-4-18-11(8)7-12(9)19-14(10)16/h3-7H,2H2,1H3
20073-24-9Relevant articles and documents
Condensation of salicylaldehydes with ethyl 4,4,4-trichloro-3-oxobutanoate: A facile approach for the synthesis of substituted 2H-chromene-3-carboxylates
Sairam, Mudulkar,Saidachary, Gannerla,Raju, Bhimapaka China
supporting information, p. 1338 - 1343 (2015/03/04)
A highly efficient and simple protocol has been developed for the preparation of ethyl 2-oxo-2H-chromene-3-carboxylates 3a-v by the condensation of salicylaldehydes 1a-v with ethyl 4,4,4-trichloro-3-oxobutanoate 2 for the first time. The reaction is proceeding via Knoevenagel pathway followed by a selective addition of the phenolic hydroxyl group to the carbonyl group adjacent to the CCl3 group rather than ester carbonyl due to a strong electron withdrawing effect and produced coumarin derivative 3a with the elimination of CHCl3.
