Modular and Stereoselective Access to cis-Diphosphinoalkenes

Diphosphine ligands are prevailing but costly toolkit in organic chemistry. Herein, we disclosed a modular approach for cis-diphosphinoalkenes and diphosphine ligand library. It experimentally featured the concerted addition process, 1,4-O/S migration, and construction of cis-only diphosphinoalkenes in a five-membered ring (=C-P-O-P-C=) manner. This modular assembly approach shall contribute to stereoselective establishment of diphosphine ligand library including DPPENs, DPPEs and beyond.

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