128360-03-2Relevant academic research and scientific papers
Expeditious synthesis of Mosher amides using a solid supported carbodiimide
Adamczyk, Maciej,Fishpaugh, Jeffrey R.
, p. 7171 - 7172 (1996)
A novel method of Mosher amide synthesis using a solid supported carbodiimide in CDCl3 is described. Estimation of optical purity can be promptly achieved by direct NMR analysis of the reaction solvent.
HR-MALDI-MS imaging assisted screening of β-Carboline alkaloids discovered from mycena metata
Jaeger, Robert J. R.,Lamshoeft, Marc,Gottfried, Sebastian,Spiteller, Michael,Spiteller, Peter
, p. 127 - 134 (2013/06/27)
Fruiting bodies of Mycena metata were screened for the presence of new secondary metabolites by means of HPLC-UV, LC-HR-ESIMS, and high-resolution matrix-assisted laser desorption/ionization mass spectrometry imaging (HRMALDI- MS imaging). Thus, a new β-carboline alkaloid, 6-hydroxymetatacarboline D (1d), was isolated from fruiting bodies of M. metata. 6-Hydroxymetatacarboline D consists of a highly substituted β-carboline skeleton, which is likely to be derived biosynthetically from L-tryptophan, 2-oxoglutaric acid, L-threonine, and L-proline. The structure of the alkaloid was established by 2D NMR spectroscopic methods and HR-ESIMS. Moreover, by extensive application of LC-HR-ESIMS, LC-HR-ESIMS/MS, and LC-HR-ESIMS3 techniques we were able to elucidate the structures of a number of accompanying β-carboline alkaloids, 1a- 1c, 1e-1i, and 2a-2g, structurally closely related to 6-hydroxymetatacarboline D, which are present in M. metata in minor amounts. The absolute configuration of the stereogenic centers of the β-carboline alkaloids was determined by GC-MS comparison with authentic synthetic samples after hydrolytic cleavage and derivatization of the resulting amino acids.
