Iminium compounds are intermediates in the vision cycle of rhodopsin. Iminium derivatives are common in biology. Pyridoxal phosphate reacts with amino acids to give iminium derivatives. …

2025年2月6日 · Here we present biochemical, structural and computational evidence for iminium catalysis by the natural Diels–Alderase SdnG, which catalyses norbornene formation in …

2021年10月29日 · David MacMillan开创了亚胺（iminium）有机催化新领域，该工作是基于他课题组设计的手性咪唑烷酮小分子催化剂（图7）。 这些催化剂的合成简易，并且已经实现了工业 …

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 …

亚胺离子（Iminium ion）是一类具有 [R1R2C=NR3R4]+ 通式的正离子，可看作是亚胺的质子化或烷基化产物。 亚胺离子很容易由胺与羰基化合物缩合生成，它实际上是一种掩蔽了的α-氨基碳 …

Imines and enamines can be hydrolyzed to aldehydes and ketones in acidic conditions: Remember, the reactions of aldehydes and ketones with alcohols and amines are all …

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 …

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 …

2007年12月12日 · Nonsilyl Bicyclic Secondary Amine Catalysts for the Asymmetric Transfer Hydrogenation of α,β-Unsaturated Aldehydes.

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 …