131137-03-6Relevant articles and documents
One-Pot Reductive Allylation of Amides by Using a Combination of Titanium Hydride and an Allylzinc Reagent: Application to a Total Synthesis of (-)-Castoramine
Itabashi, Suguru,Shimomura, Masashi,Sato, Manabu,Azuma, Hiroki,Okano, Kentaro,Sakata, Juri,Tokuyama, Hidetoshi
, p. 1786 - 1790 (2018)
A one-pot direct reductive allylation protocol has been developed for the synthesis of secondary amines by using titanium hydride and an allylzinc reagent. This protocol is applicable to a broad range of substrates, including acyclic amides, benzamides, α,β-unsaturated amides, and lactams. The stereochemical outcome obtained from the reaction with crotylzinc reagent suggested that the allylation reaction proceeds through a six-membered cyclic transition state. A total synthesis of (-)-castoramine was accomplished by following this protocol for the highly stereoselective construction of contiguous stereocenters.
Programmed assembly of binary nanostructures in solution
Ryan, Declan,Nagle, Lorraine,Rensmo, Haì?kan,Fitzmaurice, Donald
, p. 5371 - 5377 (2007/10/03)
Near size-monodisperse silver nanocrystals and silica nanospheres have been prepared and surface-modified with the [2]pseudorotaxane recognition motifs, dibenzo[24]crown-8 and dibenzylammonium cation, respectively. The silver nanocrystals, 7 nm in diameter, are shown to recognize and bind to the silica nanospheres, 180 nm in diameter, via pseudorotaxane formation. The result is the templated assembly of silver nanocrystals at the surface of the larger silica nanosphere core. This composite material exhibits optical properties that are a consequence of localizing silver nanocrystals at the surface of the silica nanospheres. The templating process is also shown to be reversible. This noncovalent recognition-directed templating strategy represents a novel metallization process resulting in the formation of composite media whose collective properties can be controlled.
