Carbohydrates
Carbohydrates are the organic compounds that are obtained in foods and living matters in the shape of sugars, cellulose, and starch. The general formula of carbohydrates is Cn(H2O)2. The ratio of H and O present in carbohydrates is identical to water.
Starch
Starch is a polysaccharide carbohydrate that belongs to the category of polysaccharide carbohydrates.
Mutarotation
The rotation of a particular structure of the chiral compound because of the epimerization is called mutarotation. It is the repercussion of the ring chain tautomerism. In terms of glucose, this can be defined as the modification in the equilibrium of the α- and β- glucose anomers upon its dissolution in the solvent water. This process is usually seen in the chemistry of carbohydrates.
L Sugar
A chemical compound that is represented with a molecular formula C6H12O6 is called L-(-) sugar. At the carbon’s 5th position, the hydroxyl group is placed to the compound’s left and therefore the sugar is represented as L(-)-sugar. It is capable of rotating the polarized light’s plane in the direction anticlockwise. L isomers are one of the 2 isomers formed by the configurational stereochemistry of the carbohydrates.
Explain what mechanism is used and how it's formed
![### Organic Chemistry Reactions Involving Cyclic Compounds
#### Reaction Scheme (k)
- **Starting Materials:**
- Compound 1: 3-Isopropyl-2,5-piperazinedione
- Compound 2: N-tert-Butyl-2-pyrrolidone carboxamide
- **Reagents:**
- DCC (Dicyclohexylcarbodiimide)
- THF (Tetrahydrofuran)
- Et3N (Triethylamine)
- **Reaction Overview:**
The starting materials, 3-Isopropyl-2,5-piperazinedione and N-tert-Butyl-2-pyrrolidone carboxamide, react in the presence of DCC, THF, and Et3N to form a target compound, along with the other by-products indicated in the reaction scheme.
- **Mechanism Insight:**
This reaction suggests the formation of an amide bond through the activation of a carboxyl group using DCC, facilitated by Et3N as a base and THF as a solvent.
#### Reaction Scheme (l)
- **Starting Material:**
- Ethylamine derivative: Ethyl-N-methyl thiazolidine-2,4-dione
- **Reagents and Conditions:**
- Step 1: Ph-N=C=S (Phenyl isothiocyanate)
- Step 2: Diluted H3O+ (Hydronium ion)
- **Reaction Overview:**
The ethylamine derivative reacts with phenyl isothiocyanate followed by the treatment with dilute hydronium ions to form multiple products as indicated by the reaction pathway.
- **Mechanism Insight:**
The primary reaction with phenyl isothiocyanate typically forms a thiourea intermediate, which is then hydrolyzed by dilute acid to yield a range of products involving cyclic thiourea and related thiazolidine derivatives.
Both reaction schemes demonstrate the application of organic reagents to manipulate cyclic compounds, illustrating the diversity and specificity of organic synthesis techniques.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F7eb16600-8f07-40f7-854e-83024f28a747%2F836c8879-7320-43a7-8a8d-725b07adb77b%2Fsuj9n4e_processed.png&w=3840&q=75)
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