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3-methyl-exo-bicyclo<2.2.2>oct-5-ene-2,3-dicarboxylic anhydride is a complex organic compound with the molecular formula C10H10O3. It is derived from the bicyclo<2.2.2>oct-5-ene structure, which features a unique eight-membered ring with two carbon atoms forming a bridge. The compound is characterized by the presence of a methyl group (-CH3) attached to the third carbon atom of the ring and two carboxylic acid groups (-COOH) at the second and third carbon atoms, which are converted into an anhydride functional group (-CO-O-CO-). This anhydride is a cyclic structure, which contributes to its stability and reactivity. It is an important intermediate in the synthesis of various pharmaceuticals and other organic compounds due to its unique structure and reactivity.

6303-67-9

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6303-67-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 6303-67-9 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 6,3,0 and 3 respectively; the second part has 2 digits, 6 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 6303-67:
(6*6)+(5*3)+(4*0)+(3*3)+(2*6)+(1*7)=79
79 % 10 = 9
So 6303-67-9 is a valid CAS Registry Number.

6303-67-9Downstream Products

6303-67-9Relevant academic research and scientific papers

Synthesis of exo-Bicyclooct-5-ene-dicarboxylic Anhydrides by Thermal Isomerization of trans-Diacids

Weisz, Adrian,Mandelbaum, Asher

, p. 5812 - 5815 (1988)

Bicyclooct-5-ene-trans-1,2-dicarboxylic acid and substituted analogues afford mixtures of the corresponding exo- and endo-anhydrides upon heating at 250-300 deg C.This isomerization provides a practical pathway to substituted and deuterium-labeled exo-anhydrides which are otherwise difficult to obtain.A mechanistic study shows that retro-diene fragmentation is not involved in the isomerization.

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