Shoichi Shimizu, Katsuyuki Kito, Yasuyuki Sasaki and Choichiro Hirai
The water-soluble calix[n]arenes 1n (n = 4, 6 and 8) containing trimethylammoniomethyl groups act as efficient inverse phase-transfer catalysts in the nucleophilic substitution reaction of alkyl and arylalkyl halides with nucleophiles in water.