Angewandte Chemie International Edition 2018-04-14

A Monoaryllead Trichloride that Resists Reductive Elimination

Marian Olaru; Ralf Kather; Emanuel Hupf; Enno Lork; Stefan Mebs; Jens Beckmann

Index: 10.1002/anie.201712944

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Abstract

Transmetallation of Pb(OAc)4 with R2Hg (1), followed by treatment with HCl in Et2O, provided RPbCl3 (2), the first kinetically stabilized monoorganolead trihalide that resists reductive elimination under ambient conditions. The kinetic stabilisation relies on an intramolecularly coordinating O‐donor substituent (R=6‐Ph2P(O)‐Ace‐5‐). The gram‐scale preparation of 2 was key for the synthesis of unsymmetrically substituted diaryllead dichlorides RR′PbCl2 (3 a, R′=Ph; 3 b, R′=4‐MeOC6H4; 3 c, R′=4‐Me2NC6H4).