Glucose forms many derivatives. The derivative which will help to prove the furanose structure is

Glucose forms many derivatives. The derivative which will help to prove the furanose structure is
  1. Acetyl
  2. Benzoyl
  3. Osazone
  4. Isopropylidene

Solution

Formation of isopropylidene derivative requires the presence of two adjacent free −OH groups in cis-orientation which is present only in the furanose form and hence, isopropylidene formation proves the presence of furanose form. *

Asked in: JEE-TOPICTESTS-CHEMISTRY

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