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. Author manuscript; available in PMC: 2010 Jan 1.
Published in final edited form as: Org Lett. 2009 Jan 1;11(1):173–176. doi: 10.1021/ol8021287

Table 1.

n-Bu4NI-Induced Electrophilic Cyclization of N,N-Dimethyl-(2-phenylethynyl) aniline with 4-Nitrobenzenesulfenyl Chloride

graphic file with name nihms86659f3.jpg
entry n-Bu4NI (equiv) solvent temp (°C) time (h) % yielda
1 1 CH2Cl2 rt 60 86 (3a)
2 1 (CH2Cl)2 70 5 90 (3a)
3 0.5 (CH2Cl)2 70 5 48 (3a) + 45 (2)
a

Isolated yields after column chromatography.