Volume 4, Issue 4 pp. 541-553
Research Article

Reactions of the HCN-Tetramer with Aldehydes

Klemens Koch

Klemens Koch

Laboratory of Organic Chemistry, Swiss Federal Institute of Technology (ETH), Hönggerberg HCI, Wolfgang-Pauli-Strasse 10, CH-8093 Zürich

Dorfstrasse 13, CH-2572 Sutz. The work described here is one of the four parts of the thesis: Klemens Koch, Promotionsarbeit ETH-Zürich, 1989–1992 [2] (Chapt. 3: ‘Die aldehydkatalysierte Hydratisierung von Blausäure-Oligomeren’, p. 33–61); the full text of the thesis can be downloaded from the internet: http://e-collection.ethbib.ethz.ch/show?type=diss&nr=9968.

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W. Bernd Schweizer

W. Bernd Schweizer

Laboratory of Organic Chemistry, Swiss Federal Institute of Technology (ETH), Hönggerberg HCI, Wolfgang-Pauli-Strasse 10, CH-8093 Zürich

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Albert Eschenmoser

Albert Eschenmoser

Laboratory of Organic Chemistry, Swiss Federal Institute of Technology (ETH), Hönggerberg HCI, Wolfgang-Pauli-Strasse 10, CH-8093 Zürich

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First published: 19 April 2007
Citations: 18

Chemistry of α-Aminonitriles Part 47. For part 46, see [1].

Abstract

The HCN-tetramer, a ‘classic’ of the prebiotic chemistry of HCN, is shown to undergo a remarkable reaction with acetaldehyde in slightly basic or neutral aqueous solution at room temperature. The reaction consists in an aldolization-type C,C-bond formation, accompanied by a (presumably aldehyde-catalyzed) hydration of one of the two nitrile groups and the formation of two cyclic aminal-type groupings, each of the latter incorporating an additional molecule of the aldehyde. Should this so far unexplored type of chemistry of the HCN-tetramer prove to have some generality, the finding might add a new dimension to the potential etiological relevance of this HCN-oligomer.

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