Prolylisoxazoles: potent inhibitors of prolyloligopeptidase with antitrypanosomal activity
作者:Gunther Bal、Pieter Van der Veken、Dimitri Antonov、Anne-Marie Lambeir、Philippe Grellier、Simon L. Croft、Koen Augustyns、Achiel Haemers
DOI:10.1016/s0960-894x(03)00579-1
日期:2003.9
Prolylprolylisoxazoles and prolylprolylisoxazolines were synthesized through a 1,3-dipolar cycloaddition reaction. These compounds are potent inhibitors of human and trypanosomal prolyloligopeptidase. They were shown to inhibit Trypanosoma cruzi and Trypanosoma b. brucei in in vitro systems with ED50'S in the lower muM range. (C) 2003 Elsevier Ltd. All rights reserved.
Diastereoselective synthesis of (−)-1-methyl-(3S,4R)-3,4-bis((2S)-N-(tert-butyloxycarbonyl)pyrrolidin-2-yl)-2-pyrrolidinone by an asymmetric Michael reaction
Beginning with enantiomerically pure L-proline, (-)-1-methyl-(3S,4R)-3,4-bis((2S)-N-(tert-butyloxy- carbonyl)pyrrolidin-2-yl)-2-pyrrolidinone was prepared in diastereomerically pure form. Taking advantage of the chiral induction of the L-proline derivatives, the intermolecular Michael reaction, used to build the pyrrolidinone ring, was carried out stereoselectively. (C) 1998 Elsevier Science Ltd. All rights reserved.
Total synthesis of newbouldine via reductive N–N bond formation
作者:Michael Pangerl、Chambers C. Hughes、Dirk Trauner
DOI:10.1016/j.tet.2010.05.085
日期:2010.8
The first total synthesis of newbouldine has been achieved employing a new, reductiveN–Nbond forming reaction. The asymmetric synthesis confirms that the natural product is a racemate.