title: Efficient synthesis of an enantiopure beta-lactam as an advanced precursor of thrombin and tryptase inhibitors.
abstract: A new and efficient synthesis of a beta-lactam that is an advanced precursor of inhibitors of thrombin and tryptase is reported. The reaction sequence is based on the use of an inexpensive enantiomerically pure starting material and is designed to allow access to both enantiomers of the target molecules by epimerization of a side-product obtained along the synthesis. An improved procedure for the epimerization step that takes advantage of the use of a polymer-supported and recyclable phase-transfer catalyst is described.
authors.affiliation: Dipartimento di Chimica Organica e Industriale and CNR-ISTM, Universita' degli Studi di Milano, Via Golgi 19 - 20133 Milano, Italy maurizio.benaglia@unimi.it
authors.forename: Rita
authors.initials: R
authors.lastname: Annunziata
authors.forename: Maurizio
authors.initials: M
authors.lastname: Benaglia
authors.forename: Mauro
authors.initials: M
authors.lastname: Cinquini
authors.forename: Franco
authors.initials: F
authors.lastname: Cozzi
authors.forename: Francesco
authors.initials: F
authors.lastname: Maggioni
authors.forename: Alessandra
authors.initials: A
authors.lastname: Puglisi
mesh_terms: D000991:Antithrombins / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D002384:Catalysis; D020650:Combinatorial Chemistry Techniques; D015195:Drug Design; D007202:Indicators and Reagents; D008958:Models, Molecular; D015394:Molecular Structure; D012697:Serine Endopeptidases; D015842:Serine Proteinase Inhibitors / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D013237:Stereoisomerism; D053802:Tryptases; D047090:beta-Lactams / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology
chemical_list: D000991:Antithrombins; D007202:Indicators and Reagents; D015842:Serine Proteinase Inhibitors; D047090:beta-Lactams; D012697:Serine Endopeptidases; D053802:Tryptases