Abstract
3,4-Di-tert-butylthiophene 1-oxide underwent 1,3-dipolar cycloadditions with 1,3-dipoles such as nitrile oxide, diazomethane, nitrile imide, nitrone, and azomethine ylide at its syn-π -face with respect to the S═O bond.
Dedicated to Professor Marian Mikołajczyk, CBMiM PAN in Łódź, Poland, on the occasion of his 70th birthday.