ChemInform Abstract: A NEW PREPARATION OF SOME DIVALENT LANTHANIDE IODIDES AND THEIR USEFULNESS IN ORGANIC SYNTHESIS

Abstract

Metallisches Samarium oder Ytterbium reagieren in Tetrahydrofuran mit 1,2‐Dijodäthan (II) bei Raumtemperatur unter Argon oder Stickstoff glatt zu den zweiwertigen Lanthanidjodiden (III).

“Asymmetric” Catalysis by Lanthanide Complexes

“…86] Evans et al reported that Sm III alkoxide complexes exhibit a higher catalytic activity for MPV reactions than Al complexes [Eq. (40)] [87].…”

Selective Synthesis of Cyclooctanoids by Radical Cyclization of Seven‐Membered Lactones: Neutron Diffraction Study of the Stereoselective Deuteration of a Chiral Organosamarium Intermediate

“…[5][6][7][8][9][10][11] Among these methods,r adical cyclization approaches are scarce and have relied mainly on radicals generated from halides, [12] ketones [13,14] and aldehydes [15] and 8-endo cyclization modes (Scheme 2A). [16] Samarium diiodide (Kagansr eagent, SmI 2 ) [17,18] is perhaps the most versatile reductive electron transfer (ET) reagent and has been used extensively for carbon-carbon bond forming reactions. [19] We recently expanded the scope of SmI 2 -mediated reactions by introducing activation modes involving the reduction of carboxylic acid derivatives using SmI 2 -H 2 O.…”

Solvent‐free cyanosilylation of aldehydes catalyzed by SmI2

“…Since the pioneering studies of Kagan, 37 samarium diiodide has rapidly become an important reagent for performing carbon-carbon bond formation. 38 -47 Recently, Concellon et al 48 observed that 1.0 equivalent of SmI 2 in tetrahydrofuran (THF) promotes the synthesis of nitro aldol by the reaction of bromonitromethane with a variety of aldehydes in 2 h. Hwang et al 49 have synthesized chiral phthalides by the reductive cyclization of 2-acylarylcarboxylates using 2 equiv.…”