SYNTHESIS OFC2-SYMMETRIC BISTHIAZOLIDINE LIGANDS DERIVED FROM L-CYSTEINE
摘要:
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.
Synthesis of heterocyclic platelet activating factor analogues
作者:Jürgen Zeidler、Werner Zimmermann
DOI:10.1016/0009-3084(95)93676-6
日期:1995.2
The synthesis of heterocyclic analogues of the platelet activating factor is described. The preparation starts with acylating rac-tetrahydro-1,3-thiazine-4-carboxylic acid ethyl ester, with palmitoyl chloride to form the amide linkage. Following ester reduction, the phosphocholine part is introduced via 2-chloro-2-oxo-1,3,2-dioxaphospholane and subsequent ring opening with trimethylamine under pressure
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