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2-exo,3-endo-dibromonorbornane is a halogenated derivative of norbornane, a bicyclic hydrocarbon with a seven-membered ring fused to a two-membered ring. 2-exo,3-endo-dibromonorbornane is characterized by the presence of two bromine atoms, one located at the exo position (2) and the other at the endo position (3) of the norbornane structure. The exo position refers to the bromine atom being on the outside of the molecule, while the endo position indicates the bromine atom being on the inside. This specific arrangement of bromine atoms influences the compound's chemical properties, reactivity, and potential applications in various fields, such as organic synthesis and pharmaceuticals.

2843-42-7

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2843-42-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 2843-42-7 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 2,8,4 and 3 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 2843-42:
(6*2)+(5*8)+(4*4)+(3*3)+(2*4)+(1*2)=87
87 % 10 = 7
So 2843-42-7 is a valid CAS Registry Number.

2843-42-7Upstream product

2843-42-7Relevant academic research and scientific papers

Cross-linked Poly-(4-vinylpyridine-styrene)-Bromine Complexes as Stereoselective Brominating Agents

Johar, Y.,Zupan, M.,Sket, B.

, p. 2059 - 2062 (2007/10/02)

Cross-linked poly(styrene-4-vinylpyridine) beads, containing 40-43percent of pyridine rings, were transformed with bromine to provide three types of brominating agents (1), (2), and (3).Reactions of cis- and trans-1-phenylpropene with (1), (2), and (3) resulted in a high degree of anti-stereoselectivity.The reactivity increases from (1) to (3); solvent polarity had no significant effect on stereoselectivity, but affects the reactivity, being significantly greater in acetonitrile and chloroform than in cyclohexane and dioxan.Bromination of 1-phenylcyclohexene with (1) and (3) resulted in the formation of trans-1,2-dibromo-1-phenylcyclohexane (9) and 3-bromo-2-phenylcyclohexene (10), the temperature affecting only the ratio of the products.Bromonation of norbornene with the reagents (1), (2) and (3) resulted in the formation of seven products: 2-exo-bromonorbornane (12), 7-bromonortricyclane (13), 2-exo,3-endo-dibromonorbornane (14), 2-exo-7-anti-dibromonorbornane (15), 2-exo,5-endo-dibromonorbornane (16), 2-exo,5-exo-dibromonorbornane (17), and 2-exo,7-syn-dibromonorbornane (18).

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