Carbon-centered radicals represent highly useful reactive intermediates in organic synthesis. Their nucleophilic character is reflected by fast additions to electron deficient C=X double …

2022年7月20日 · Mechanistically, the formation of an imine involves two steps. First, the amine nitrogen attacks the carbonyl carbon in a nucleophilic addition step (step 1) which is closely …

2017年3月10日 · Upon radical addition to the iminium ion A-1, the electron-relay mechanism bypasses the unstable distonic radical B-1 producing a carbazoliumyl radical cation C-1, which …

Iminium ions refer to a class of compounds that can be synthesized through various methods and react with different reagents to form aminoalkylation products. They have been extensively …

2006年11月11日 · Our studies revealed that tetrahedral host 1 can encapsulate a variety of iminium cations in a molecular recognition process that is selective based on the charge, …

2025年3月26日 · The H72 then supplies the proton to the Schiff base via S91, resulting in the iminium cation, now in a position that facilitates the cycloaddition with the cyclopentadiene …

2006年9月15日 · For trialkylamines, the intermediate has to be an enamine or an iminium cation and the transfer of a methyl group can only be explained by an iminium cation. The lone pair …

An iminium ion is a type of organic cation with the general formula R2C=NR', where R and R' are organic substituents. Iminium ions are important intermediates in various organic reactions, …

An iminium ion is a positively charged species formed by the reaction of an amine with a carbonyl compound, such as an aldehyde or ketone. It is a key intermediate in various organic …

2017年3月20日 · Chiral iminium ions—generated upon condensation of α,β-unsaturated aldehydes and amine catalysts—are used extensively by chemists to make chiral molecules in …