Condensation reactions glucose

1. Nov 26, 2004

Cheman

Condensation reactions occur between the OH and H of C 1,4 and 6 to form polysaccharides - why do we not get reaction at C 2 or 3? ( 5 is obvious since it is not attached to H or OH )

Thanks.

2. Nov 27, 2004

Cheman

What I mean is, why do we only get the end OH and H's reacting (eg - in the case of amolase in starch) or the ones on the C chain not in the ring ( as the case with glycogen) not the others?

Thanks.

3. Dec 5, 2004