4440-40-8 Usage
General Description
2,4,6-Cycloheptatriene-1-carboxylic acid is a chemical compound with the molecular formula C8H6O2. It is a carboxylic acid derivative of cycloheptatriene, containing a carboxylic acid functional group at the 1 position. 2,4,6-Cycloheptatriene-1-carboxylic acid is an aromatic carboxylic acid, with a six-membered ring and a double bond, giving it aromatic properties. It is commonly used in organic synthesis and as a building block for the production of various pharmaceuticals, agrochemicals, and materials. Additionally, it is known for its aromatic and reactive properties, making it useful in the development of new chemical compounds and materials.
Check Digit Verification of cas no
The CAS Registry Mumber 4440-40-8 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 4,4,4 and 0 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 4440-40:
(6*4)+(5*4)+(4*4)+(3*0)+(2*4)+(1*0)=68
68 % 10 = 8
So 4440-40-8 is a valid CAS Registry Number.
4440-40-8Relevant articles and documents
Heptafulvenone, vinylketene, butadienylketene, and allenylketene - Facile generation, observation, and radical reaction with TEMPO
Tidwell, Thomas T.,Fenwick, Michael H.
, p. 3415 - 3419 (2007/10/03)
Heptafulvenone (1), vinylketene (11), 1,3-butadienylketene [(E)-15], and allenylketene (21) have been prepared by reaction of the corresponding acyl chlorides with 1,8-bis(dimethylamino)naphthalene as long-lived species in solution at room temperature, and their ketenyl IR bands observed under these conditions for the first time, at 2101, 2118, 2111, 2117 cm-1, respectively. These unsaturated ketenes react with tetramethylpiperidinyloxyl (TEMPO, TO.) with initial attack at the carbonyl carbon giving delocalized radicals which give from 1 a mixture of the ring contracted o-, m-, and p-formylbenzoates O=CHC6H4CO2T (6) and the bis-(cycloheptatrienyl) dimer 7. The products from 11, (E)-15, and 21 are the bis(TEMPO) adducts (E,Z)-TOCH2CH= CHCO2T (12), (E,E)-TOCH2CH=CHCH=CHCO2T (17), and (E,Z)-CH2=C(OT)CH=CHCO2T (22), respectively.