Chapter 25, Problem 33DSP

Interpretation Introduction

Interpretation:

In the structure of $\text{6-deoxyerythronolide B}$, the number of carbon atoms which come from acetate and from propanoateare to be determined.

Concept introduction:

Many polyketides have one or more methyl groups attached to their carbon chain.

Polyketides contain alternate ${\text{C=O and CH}}_{\text{2}}$ groups as well ascompounds derived from them.

An acetate contains two carbon atoms in a chain such that a methyl group is directly attached to a carbonyl.

A propanoate contains three carbon atoms in a chain such that an ethyl group is directly attached to a carbonyl.