A novel one-pot, two-step synthesis of N-acyl-1,3-thiazolidines and N-acyl-1,3-oxazolidines as potential double prodrugs of formaldehyde
摘要:
A convenient and general one-pot, two-step protocol to prepare both N-acyl-1,3-thiazolidines and N-acyl-1,3-oxazolidines from formaldehyde, fatty acyl chlorides, and natural a-amino acids has been performed for the peculiar case of formaldehyde. In the presence of triethylamine to promote both the ring-forming process and the amide bond formation, subsequent addition of the acyl donor proved to be efficient to trap the preformed stable formaldehyde-derived 1,3-thiazolidine or the transient 1,3-oxazolidine using an appropriate ratio of formaldehyde. (c) 2011 Elsevier Ltd. All rights reserved.
Chiral ferrocenylthiazolidines, new ligands for palladium complexes
作者:Asensio González、Jaume R Granell、Concepción López
DOI:10.1016/s0022-328x(01)00880-4
日期:2001.12
The reaction of ferrocene with methyl or ethyl esters of l-cysteine in the presence of paraformaldehyde is studied. This process yields the optically pure derivatives: methyl or ethyl (R)-3-(ferrocenylmethyl)thiazolidine-4-carboxylates (1a or 1b), together with the corresponding N,N-bisthiazolidine derivatives (2a or 2b). When the reaction was carried out using the ethyl ester of l-cysteine, small
Stereochemical study of 1,3-N,X-heterocycles derived from α-aminoacids and formaldehyde. Structural evidence for the existence of the anomeric effect
作者:Jimmy Sélambarom、Francis Carré、Alain Fruchier、Jean Pierre Roque、André A Pavia
DOI:10.1016/s0040-4020(02)00405-2
日期:2002.5
We have shown that condensation of l-cysteine methyl ester (8) and l-threonine methyl ester (11) with formaldehyde provides a convenient and efficient access to novel heterocyclic 2:3 adducts. Depending on the amino acid, the condensation leads to either the N,N′-methylenebis(thiazolidine) (10, l-cys) or -(oxazolidine) (13, l-thr) derivative or to its bicyclo[4.4.1]undecane isomer (5, l-ser) as the
SYNTHESIS OF<i>C</i><sub>2</sub>-SYMMETRIC BISTHIAZOLIDINE LIGANDS DERIVED FROM L-CYSTEINE
作者:Sandra Díaz、Asensio González
DOI:10.1081/scc-100103989
日期:2001.1
Treatment of L-cysteine esters and thiazolidine-4-carboxylic esters with an excess of paraformaldehyde in the presence of trifluoroacetic acid provides C-2-symmetric N,N'-methylenebisthiazolidines in good yield.