Highly chemoselective osmium-mediated dihydroxylation of 2-vinyl and 2-allyl-1,3-dithiane 1-oxides
摘要:
Chemoselective dihydroxylation of the double bonds of alkenyl-substituted 1,3-dithiane 1-oxide derivatives takes place without competing sulfur oxidation using osmium trichloride and potassium Ferricyanide. (C) 1998 Elsevier Science Ltd. All rights reserved.
Reaction of tetracarbonyl(π-allyl)manganese with carbon nucleophiles
摘要:
Nucleophilic attack on tetracarbonyl(pi-allyl)manganese takes place at the terminus of the pi-system, generating allylated products in 44-95% yield after oxidation. Stabilized nucleophiles (pK(a) 12-20) give mainly his allylation whereas nonstabilized nucleophiles (pKa 25-35) give mono allylation. (C) 1997 Elsevier Science Ltd.