Chromanone → Benzopyran

HRID 2226632Notes

Reaction equation

HRID 2226632 reaction equation
[CH:1]1[CH:2]=[CH:3][C:4]2[O:11][CH2:10][CH2:9][C:7](=O)[C:5]=2[CH:6]=1.O1C2C(=CC=CC=2)CCC1O>>[O:11]1[C:4]2[C:5](=[CH:6][CH:1]=[CH:2][CH:3]=2)[CH:7]=[CH:9][CH2:10]1

Participants

3

Reactant 2

HCID 68110ChromanoneHCID 11171070Chroman-2-ol

Product 1

HCID 9211Benzopyran

Procedure

In the same manner as described in Example 32, the formed chromanone compound was converted to a chromanol compound, and the dehydration reaction, separation and purification were carried out to obtain 6.58 g of a chromene compound represented by the following formula: ##STR164##

Workup

  1. customthe dehydration reaction, separation and purification

Sources & evidence

ORD record
ord-d6add78974c94a88b9456711dadc1571
Source dataset
uspto-grants-1994_09
Patent number
US05349065

Reaction notes

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