Synthesis of new (3-aminopyrrolidin-3-yl)phosphonic acid - a cucurbitine analog - and (3-aminotetrahydrothiophen-3-yl)phosphonic acid via phosphite addition to heterocyclic hydrazones.

[摘要]：Hydrazones were prepd. by condensation of carbocyclic and heterocyclic ketones with benzoyl- and tosylhydrazines. These hydrazones underwent nucleophilic addn. 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.

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