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1-Cyclopropylidene is a chemical compound with the molecular formula C4H6, characterized by a cyclopropane ring with a carbon-carbon double bond (C=C) attached to one of the carbon atoms. This structure results in a strained, three-membered ring, which is highly reactive due to the ring's angle strain and bond strain. The compound is an important intermediate in organic synthesis, particularly in the preparation of various pharmaceuticals and agrochemicals. It can undergo a range of chemical reactions, such as Diels-Alder reactions, electrophilic addition, and nucleophilic substitution, making it a versatile building block in the synthesis of complex organic molecules.

4663-24-5

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4663-24-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 4663-24-5 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 4,6,6 and 3 respectively; the second part has 2 digits, 2 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 4663-24:
(6*4)+(5*6)+(4*6)+(3*3)+(2*2)+(1*4)=95
95 % 10 = 5
So 4663-24-5 is a valid CAS Registry Number.

4663-24-5Downstream Products

4663-24-5Relevant academic research and scientific papers

Carbene Rearrangements, X. 2-Vinylcyclobutylidene

Brinker, Udo H.,Koenig, Lothar

, p. 882 - 893 (2007/10/02)

The Bamford-Stevens reaction of 2-vinylcyclobutanone tosylhydrazone sodium salt (13) has been studied with respect to the potential carbene-carbene rearrangement 3 -> 4. 2-Vinylcyclobutylidene (3) surprisingly undergoes exlusively carbene rearrangements.In 3 the cyclobutylidene-methylenecyclopropane rearrangements to 16 and 17 dominate.The 1,3-carbon migration of the divalent carbon is not observed.

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