Tétrose

Un tétrose est un ose (monosaccharide) à quatre atomes de carbone, de formule brute C4H8O4.

Les tétroses ont soit un groupe fonctionnel aldéhyde en position 1 (aldotétroses), soit un groupe fonctionnel cétone en position 2 (cétotétroses).

Les aldotétroses ont deux centres stéréogènes (atomes de carbone asymétriques) : deux paires d'énantiomères, diastéréoisomères entre elles, sont possibles.

Les aldotétroses naturels sont le :

Le seul cétotétrose naturel est le D-érythrulose.

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