The previously developed stereoselective [3+2] cycloaddition between N‐tert‐butanesulfinyl ketimines and arynes has been extended to the synthesis of enantiopure [(2‐pyridyl)sulfonyl]difluoromethylated cyclic sulfoximines. The use of 2‐PySO₂CF₂ as the facilitating group offers new opportunities for the elaboration of the [3+2] cycloaddition products by virtue of the diverse relativity of 2‐pyridyl sulfones.

中文翻译：

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N-叔丁烷亚磺酰基[（2-吡啶基）磺酰基]-二氟甲基酮亚胺和Arynes之间的立体选择性[3 + 2]环加成反应合成对映体纯的苯并稠合的环状亚砜

之间的先前开发的立体选择[3 + 2]环加成Ñ -叔-butanesulfinyl酮亚胺和arynes一直延伸到对映体纯的合成[（2-吡啶基）磺酰基] difluoromethylated环状亚磺酰亚胺。由于2-吡啶基砜的相对性不同，使用2-PySO ₂ CF ₂作为促进基团为[3 + 2]环加成产物的精制提供了新的机会。