Derivatives of heterocyclic α-iminocarboxylic acids. 4. Reduction of N-alkoxycarbonyl derivatives of α-iminocarboxylic acids

Abstract

When N-methoxycarbonyl and N-benzoxycarbonyl derivatives of methyl esters of aziridine-2-carboxylic acid, L-proline, L-thioproline, and pipecolic acid interact with NaBH₄ in tert-butanol/methanol, the products of reduction of the C-methoxycarbonyl group of the original compounds are accompanied by bicyclic urethanes and oxazolidines. Reduction of N-maleates and N-fumarates of heterocyclic α-iminocarboxylic acids leads to the formation of α-hydroxymethyl-N-[4-(2-oxo-2,5-dihydrofuryl)] derivatives of pyrrolidine, piperidine, 1,3-thiazolidine, and 1,4-thiazan. In the latter case, 1-aza-2-hydroxymethyl-4-oxo-5-oxa-9-thiabicyclo [5.4.0]undecene-2 is also obtained. The N-maleates and fumarates of aziridine-2-carboxylic acid are reduced anomalously by sodium borohydride, forming 2-hydroxymethyl-2-(β-hydroxyethyl)-3-oxa-1-azabicyclo[3.1.0]hexanes.

How to Cite
Nurdinov, R.; Liepin'sh, É. É.; Kalvin'sh, I. Ya. Chem. Heterocycl. Compd. 1993, 29, 1352. [Khim. Geterotsikl. Soedin. 1993, 1567.]

For this article in the English edition, see DOI https://doi.org/10.1007/BF00532039