Hanumantha Rao, A. et al. 2015. PEG-600 Mediated Phase Transfer Catalyst Free N-Alkylations of 2-Butyl-5-chloro-1H-imidazole-4-carbaldehyde. Asian Journal of Chemistry. 27, 5 (Feb. 2015), 1910–1912. DOI:https://doi.org/10.14233/ajchem.2015.18495.