@article { ISI:000369587800022, title = {Ammonium catalyzed cyclitive additions: evidence for a cation-pi interaction with alkynes}, journal = {Chemical Communications}, volume = {52}, number = {11}, year = {2016}, month = {DEC}, pages = {2311-2313}, publisher = {ROYAL SOC CHEMISTRY}, address = {THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND}, abstract = {

The addition of carbamate nitrogen to a non-conjugated carbon-carbon triple bond is catalyzed by an ammonium salt leading to a cyclic product. Studies in homogeneous systems suggest that the ammonium agent facilitates nitrogen-carbon bond formation through a cation-p interaction with the alkyne unit that, for the first time, is directly observed by Raman spectroscopy.

}, issn = {1359-7345}, doi = {10.1039/c5cc08641h}, author = {Nagy, Edith and St Germain, Elijah and Cosme, Patrick and Maity, Pradip K. and Terentis, Andrew C. and Lepore, Salvatore D.} }