Question

How would you convert D-glucose to a mixture of ethyl a-D-glucopyranoside and B-D-glucopyranoside.
Show all steps involved in the mechanism of their formation
D-ग्लूकोज को इथाइल 4-D-ग्लूकोपाइरेनोसाइड और B-D-ग्लूकोपाइरेनोसाइड के मिश्रण से किस प्रकार
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Tritacar
nutarotation​

Answer 1

D-ग्लूकोज को इथाइल 4-D-ग्लूकोपाइरेनोसाइड और B-D-ग्लूकोपाइरेनोसाइड के मिश्रण से किस प्रक

Answer 2

D-glucose can be converted to a mixture of ethyl α-D-glucopyranoside and β-D-glucopyranoside in the following steps:-

1. Initially, a small quantity of hydrogen chloride gas is made to pass through a solution of D-glucose in ethanol.
2. Attack of acid results in the formation of a carbocation. This carbocation gets stabilized by resonance,
3. The oxygen of ethanol then attacks the resonance stabilized carbocation from either side.
4. Therefore, a mixture of both the acetals of glucose is formed.

The mechanism of the reaction is diagrammatically explained in the attachment.