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If alpha-D-glucopyranose is reacted with...

If `alpha`-D-glucopyranose is reacted with acetic anhydride at 373 K, the major product is the `beta`-isomer of the penta acetate. It is attributed to

A

isomerisation of `alpha` -D into `beta`-D-glucose at 373K

B

opening of glucopyranose ring

C

Both the statements are correct

D

None of the statement is correct

Text Solution

Verified by Experts

The correct Answer is:
A
isomerisation of `alpha` -D into `beta`-D-glucose at 373K
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Paragraph An organic compound A(C_(9)H_(6)O_(3)) does not react with aqueous solution of NaHCO_(3) as well as does not change the colour of litmus paper. Aon acid hydrolysis gives B(C_(9) H_(8)O_(4)) as major product whereas A on treatment with one equivalent of methanol in acidic medium gives C(C_(10)H_(10)O_(4)) as the major product (other minor isomer of C is also formed). B on heating with sodalime gives toluene. Answer the following questions based on the above information. The most likely structure of B is

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