A Chiral Sulfoxide-Based C–H Acid

Abstract We report the design and synthesis of a strong, chiral, enantiopure sulfoxide-based C–H acid. Single-crystal X-ray analysis confirms the proposed structure and its absolute configuration. The new motif shows a high acidity and activity in Brønsted and Lewis acid catalyzed transformations. So far, only little to no enantioselectivities were achieved.