SEARCH Articles Figures Tables 2-Substituted alkyl 3- Alkyl substitute Alkylation catalysis Alkylation nucleophilic Alkylations catalysis Catalysis substitution Crown ethers catalysis Crown substituted Ethers nucleophilicity Ethers, substituted Nucleophile alkyl Nucleophile catalysis Nucleophiles alkylations Nucleophiles catalysis, nucleophilic Nucleophiles, alkylation Nucleophilic alkyl substitution Nucleophilic catalysis Nucleophilic substitution catalysis Nucleophilic substitutions ethers Substitution alkylation