Does NH[SUB]3[/SUB] react with aldehyde ?

[leojun]

does NH₃ react with compounds having aldehydic group?(if,yes.why doesn't glucose react with NH₃. 0.02% of glucose has open chain structure that has free aldehydic group) In my textbook its given that NH₃ doesn't react with glucose and this led to the conclusion that glucose had ring structure with no free aldehydic group.

 

[Bystander]

Ammonia (or amines) plus aldehydes do react to form imines; the reaction is acid catalyzed (pH dependent), and pH of the "0.02% open chain glucose" might interfere.