Synthesis, stereochemical assignment, and bioactivity of the Penicillium metabolites penicillenols B1 and B2
摘要:
The Penicillium metabolites penicillenols B-1 and B-2 were synthesised for the first time by elimination of a mesylated penicillenol A precursor as obtained from an L-threonine derived tetramic acid. The (Z,S)-and (E,S)-configured diastereomers were identical to the natural compounds as to NMR spectra and optical rotations. Both isomers showed antiproliferative effects against cancer and endothelial cell lines and penicillenol B-1 was also notably antibiotic against Staphylococcus aureus. (C) 2015 Elsevier Ltd. All rights reserved.
Synthesis, stereochemical assignment, and bioactivity of the Penicillium metabolites penicillenols B1 and B2
摘要:
The Penicillium metabolites penicillenols B-1 and B-2 were synthesised for the first time by elimination of a mesylated penicillenol A precursor as obtained from an L-threonine derived tetramic acid. The (Z,S)-and (E,S)-configured diastereomers were identical to the natural compounds as to NMR spectra and optical rotations. Both isomers showed antiproliferative effects against cancer and endothelial cell lines and penicillenol B-1 was also notably antibiotic against Staphylococcus aureus. (C) 2015 Elsevier Ltd. All rights reserved.
An improved synthesis of Fmoc-N-methyl serine and threonine
作者:Rajesh H. Bahekar、Pradip A. Jadav、Dipam N. Patel、Vijay M. Prajapati、Arun A. Gupta、Mukul R. Jain、Pankaj R. Patel
DOI:10.1016/j.tetlet.2007.05.112
日期:2007.7
An improved method for the synthesis of Fmoc-N-methyl serine and threonine has been developed, which involves formation and subsequent reduction of the corresponding oxazolidinone with a Lewis acid under mild conditions, with improved yields and shorter reaction times. (C) 2007 Elsevier Ltd. All rights reserved.