Isomaltose, a disaccharide formed during caramelization in cooking, contains two glucose units bonded α (1→6) . Draw the structure of isomaltose.

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All right. Hello everyone. So this question says that tree halos is a disaccharide used as a stabilizer in food and pharmaceutical products. It consists of two glucose units bonded alpha 11 provide the structure of Trejos. So before we go ahead and talk about the structure of the Glyco cytic bond mentioned, let's start by drawing out the structure of our glucose units. So here we have to start with the Hayworth projection. That is the cyclic structure of alpha D glucose. It should be the alpha ener because that's what's mentioned in the notation of the Glyco cytic bond. So because glucose, if you recall forms a six member ring, that's the first thing I'm going to draw here. So by convention, the oxygen of the ring is on the top right corner and carbon number one of the ring is on the far right side. So here I'm just adding some shading to the front of the ring 43 dimensionality. Now, as mentioned before, this should be the alpha ener. And so what that means is that the hydroxy group of the anomic carbon that is carbon number one should point downwards whereas its hydrogen atom points upwards. So on carbon number two of the ring, the hydroxy group is also going to point downwards and the hydrogen also points upwards on carbon. Number three, we have the hydroxy group pointing upwards and hydrogen pointing downwards on carbon. Number four, we have hydroxy group downwards and hydrogen upwards. Now carpet number five is unique because its hydroxy group is actually the oxygen of the ring. So its hydrogen is going to point downwards. But carbon number six of glucose is going to point upwards above the ring itself. So the good news is that tree helos is simply made of two glucose units. So what I'm going to do here is just go ahead and copy and paste the first structure that I drew because both glucose units are going to have the same structure. So now the question is how to go about depicting this glyco cytic bond. So as mentioned before, right, the two glucose units are bonded by an alpha 11 glyco cytic linkage. So carbon number one of both glucose molecules are the ones participating in the glyco cytic bond. So to depict this, I'm going to have to go ahead and reflect my second glucose unit here. But for now, let me modify the first. So the first thing that happens is that there's going to be an oxygen in between both anomic carbons of my glucose subunits. So here I'm essentially drawing out the same exact structure but the only difference is that I'm reflecting the second glucose unit just to go ahead and showcase the glyco cytic bond. So notice how both anomic carbons from both glucose units retained their alpha configuration. And here you have it here we have the completed structure of tree helos. So with that being said, thank you so very much for watching and I hope you found this helpful.

Isomaltose, a disaccharide formed during caramelization in cooking, contains two glucose units bonded α (1→6) . Draw the structure of isomaltose.

Verified Solution

Key Concepts

Disaccharides

Glycosidic Bonds

Caramelization