113948-07-5

Upstream product

• 75-04-7 ethylamine 
• 1711-02-0 4-iodobenzoic acid chloride 
• 619-58-9 4-iodobenzoic acid 
• 113948-05-3 C₉H₉⁽²⁾HINO 

Downstream Products

• 113948-09-7 C₉H₁₀⁽²⁾HNO 
• 113948-05-3 C₉H₉⁽²⁾HINO 

Relevant academic research and scientific papers

Polyaromatic propynyl compounds and pharmaceutical/cosmetic compositions comprised thereof

Novel pharmaceutically/cosmetically-active polyaromatic propynyl compounds have the structural formula (1): STR1 in which X is one of the radicals: STR2 and are useful for the treatment of a wide variety of disease states, whether human or veterinary, for example dermatological, rheumatic, respiratory, cardiovascular and ophthalmological disorders, as well as for the treatment of mammalian skin and hair conditions/disorders.

Does Formal Intramolecular Transfer of an Acidic Deuterium to a Site of Halogen-Lithium Exchange Show That Lithium-Halogen Exchange Is Faster than Loss of the Acidic Deuterium? Evidence in Favor of an Alternative Mechanism

Reactions in which there is formal intramolecular transfer of an acidic deuterium to a site of halogen-lithium exchange could be interpreted to show that initial halogen-lithium exchange occurs faster than loss of the acidic deuterium.However studies of the competition between halogen-metal-deuterium exchange and deuterium loss for N-deuterio-N-alkyl-o, -m, and -p-halobenzimides are not consistent with that mechanism.We suggest an alternative in which initial loss of the acidic deuterium is followed by halogen-lithium exchange to give a dilithiated intermediate.Deuterium transfer to the site of halogen-lithium exchange then occurs by reaction of the dilithiated species intermolecularly with unreacted N-deuteriated amide.The halogen-lithium exchange is faster than complete mixing of the reactants and can occur either in an initially formed deprotonated complex or in a transient high local concentration of organolithium reagent.Evidence for both possibilities is provided.Two reactions from the literature in which halogen-lithium exchange appears to be faster than transfer of an acidic hydrogen have been reinvestigated and found to be interpretable in terms of similar sequences.