Synthesis 2008(15): 2353-2362  
DOI: 10.1055/s-2008-1067130
PAPER
© Georg Thieme Verlag Stuttgart ˙ New York

Synthesis of New (3-Aminopyrrolidin-3-yl)phosphonic Acid - A Cucurbitine Analogue - and (3-Aminotetrahydrothiophen-3-yl)phosphonic Acid via Phosphite Addition to Heterocyclic Hydrazones

Nicolas Rabasso, Antoine Fadel*
Laboratoire de Synthèse Organique et Méthodologie, UMR 8182, Institut de Chimie Moléculaire et des Matériaux d’Orsay, Bât. 420, Univ Paris-Sud, 91405 Orsay, France
Fax: +33(1)69156278; e-Mail: antfadel@icmo.u-psud.fr;
Further Information

Publication History

Received 11 January 2008
Publication Date:
11 June 2008 (online)

Abstract

Hydrazones were prepared by condensation of carbo­cyclic and heterocyclic ketones with benzoyl- and tosylhydrazines. These hydrazones underwent nucleophilic addition with phosphite to provide efficiently (3-hydrazinopyrrolidin-3-yl)-, (3-hydrazino­tetrahydrothiophen-3-yl)-, (3-hydrazinotetrahydrofuran-3-yl)-, and (1-hydrazinocyclopentyl)phosphonates. Cleavage of the hydrazine N-N bonds followed by acidic hydrolysis of the phosphonate functions of the (3-aminoheterocyclopentyl)phosphonates gave the new (3-aminopyrrolidin-3-yl)- and (3-aminotetrahydrothiophen-3-yl)phosphonic acids. This synthesis was achieved in a four-step sequence from the appropriate ketones.

26

Ketone 8 was prepared from its corresponding alcohol by use of the Dess-Martin oxidation reagent.

34

For hydrolysis with TMSI, see the experimental section

36

Unfortunately, HRMS could not be carried out despite use of various kinds of methods, including ESI, EI, or CI.