Scheme 1. Preparation of complexes 1–3 from 4[H][Cl]. a = Ag2O, CH2Cl2, b = 0.45 (C4H8S)AuCl, THF, c = (C4H8S)AuCl, THF, d = NaN(SiMe3)2, toluene, and 0.45 (C4H8S)AuCl.
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