Question

How cloes Fischer projection formula is converted into Hawnath projection formula of fruchse..?​

Answer 1

Explanation:

The first step in converting a Fischer to a Haworth is to draw in these wedges and to number the carbons. This sets us up to form a bond between the C5-OH and the carbonyl carbon (C-1), which will make a new ring. [If this is unclear, see this earlier post on ring-chain tautomerism for more examples.]

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