Pyrrole 2nd N-methylpyrrole reacted with aryl-and alkylsulfinyl chlorides, at 0 “C, to give the corresponding 2-sulfinylpyrroles as the major products only when contact of the products with the liberated hydrogen chloride was minimized or eliminated. If this precaution was not taken, the 3-sulfinylpyrroles were the principle products. In contrast, N-(phenylsuKny1) succinimide (2a) reacted, at room temperature, with a variety of pyrroles to produce the 2- ...
[Bray, Brian L.; Mathies, Peter H.; Naef, Reto; Solas, Dennis R.; Tidwell, Thomas T.; et al. Journal of Organic Chemistry, 1990 , vol. 55, # 26 p. 6317 - 6328]
