The Chemistry of Thietane Ligands in Polynuclear Metal Carbonyl Complexes

Hydrodesulfurization Catalysts and Catalyst Models Based on Mo—Co—S Clusters and Exfoliated MoS2

“…Adams et al have studied the reactions of organic sulfides with osmium clusters (45)(46)(47). In an extensive series of papers, they have isolated new clusters resulting from S-H, C-S, and C-H bond insertions, as well as reductive elimination of alkanes or arenes, dehydrogenation of the organic moiety and oligomerization of the organic sulfide.…”

Sulfur (and Related Elements)–X Activation

“…It was mentioned in the patent that the Pt-complex also possessed catalytic activity for the transformation, although the yield of product was unsatisfactory. In 1984, the hydrothiocarboxylation of a 1,3-diene catalyzed by Co 2 (CO) 8 in pyridine was also reported in a patent [17]. In 1986, Alper et al reported that a similar transformation to the one shown in Eq.…”

“…in 1960 [14]. The reaction of (PhS) 2 (7.43) In 1985, Alper et al discovered that the same reaction took place under much milder conditions using Co 2 (CO) 8 as a catalyst and benzene as a solvent (58 atm of CO at 185°C overnight) to afford 57 in 69% yield (Eq. 7.43) [49].…”

“…7.43) [49]. The proposed mechanism (Scheme 7-12) includes: (a) oxidative addition of (PhS) 2 to Co 2 (CO) 8 This exemplified that the oxidative addition of S-S bond to a low-valent metal complex is one prototype to initiate a reaction using a disulfide. In 1987, Uemura et al reported an analogous transformation using (PhSe) 2 instead of (PhS) 2 In 1991, the first practical doublethiolation and doubleselenation, that is, the Pdcatalyzed addition of diaryl disulfide and diaryl diselenide to terminal alkynes, were reported to provide cis-adducts 62 in good yields (Eq.…”

Synthesis of Four- to Seven-Membered Heterocycles by Ring Expansion: Ring Expansions of Thiiranes and Thietanes

“…Thiiranes [1][2][3][4][5][6][7][8] and thietanes [9][10][11][12][13][14][15][16][17][18][19] are important intermediates in organic synthesis, just as their three-and four-membered oxygen and nitrogen analogs (oxiranes and aziridines, and oxetanes and azetidines) [20][21][22][23][24][25][26]. They have been widely applied in the preparation of sulfur-containing compounds, such as diverse thiols, thioethers, and ring-expansion products, via ring-opening reactions, isomerizations, insertions, and ring openings followed by intramolecular cyclization.…”