96233-05-5Relevant articles and documents
Regio- and enantioselective control in the reactions of α-(N-Carbamoyl)alkylcuprates with allylic phosphates
Dieter, R. Karl,Gore, Vinayak K.,Chen, Ningyi
, p. 763 - 766 (2007/10/03)
α-(N-Carbamoyl)alkylcuprates (RCuCNLi or R2CuLi) react with allylic phosphates to afford homoallylic amines in good chemical yields. Regioselectivity is governed by steric factors in both the cuprate reagent and phosphate substrate and systems can be designed to give either the S N2′ or SN2 substitution product cleanly. Excellent enantioselectivities can be achieved with either a scalemic α-di[(N- carbamoyl)-alkyl]cuprate and an achiral phosphate or with a scalemic allylic phosphate and an achiral cuprate reagent.
An improved method for Lewis acid catalyzed phosphoryl transfer with Ti(t-BuO)4
Jones, Simon,Selitsianos, Dimitrios,Thompson, Kate J.,Toms, Steven M.
, p. 5211 - 5216 (2007/10/03)
Several inorganic esters have been evaluated as phosphoryl transfer catalysts. Of these, Ti(t-BuO)4 was found to be the most effective catalyst giving excellent yields of the desired phosphate esters. The loading of the catalyst could be reduced to a little as 5 mol % for a majority of substrates with no loss in the yield of product. This methodology is significantly more versatile than using TiCl4 and is suitable for the phosphorylation of more complex carbohydrates and molecules of biological interest.
