The Mannich-type Reaction between N,O-Acetals and Carbon Nucleophiles under Solvent-free Conditions
摘要:
The Mannich-type reaction for 1-methoxycarbonyl- or 1-benzyloxycarbonyl-2-methoxylpyrrolidine with carbon nucleophiles such as acetylacetone, methyl acetoacetate, dimethyl malonates, benzoylacetone, dibenzoylmethane, or cyclohexane-1, 3-dione proceeded by acid catalysis under solvent-free conditions with more efficiency than that in dichloromethane.
Direct Oxidative Carbon−Carbon Bond Formation Using the “Cation Pool” Method. 1. Generation of Iminium Cation Pools and Their Reaction with Carbon Nucleophiles
method that involves the generation of a “cation pool” using low-temperature electrolysis, and then its reaction with nucleophiles under non-oxidative conditions. This one-pot method solves problems associated with conventional oxidative generation of cations and their in situ reaction with nucleophiles, and provides an efficient method for direct oxidative carbon−carbon bond formation. As an example