LiNTf2 in the reaction of lactones with amines is able to activate cyclic esters towards ring opening, thus leading to clean open-chain amides under mild conditions and using a stoichiometric amount of amine. The generality of the method was demonstrated by a range of selected lactones and amines.
A prodrug system for hydroxylamines based on esterase catalysis
作者:Ana Conejo-Garcia、Christopher J. Schofield
DOI:10.1016/j.bmcl.2005.06.026
日期:2005.9
The synthesis and reactivity of hydroxy hydroxamates as models for a prodrug form of hydroxylamine are described. gamma-Hydroxy hydroxamates were found to enable hydroxylamine release via lactonisation. Hydroxamates were found to undergo esterase catalysed hydrolysis. (c) 2005 Elsevier Ltd. All rights reserved.
Isoprenoid Biosynthesis via the Methylerythritol Phosphate Pathway: Structural Variations around Phosphonate Anchor and Spacer of Fosmidomycin, a Potent Inhibitor of Deoxyxylulose Phosphate Reductoisomerase
Fosmidomycin and its analogue FR-900098 are potent inhibitors of 1-deoxy-d-xylulose 5-phosphate reducto-isomerase (DXR), the second enzyme of the MEP pathway for the biosynthesis of isoprenoids. This paper describes the synthesis of analogues of the two reverse phosphonohydroxamic acids 3 and 4, in which the length of the carbon spacer is modified, the N-methyl group of 3 is replaced by an ethyl group