Molbank 2009, 2009(3), M602; doi:10.3390/M602
Short Note

Preparation of 5-Bromo-2-naphthol: The Use of a Sulfonic Acid as a Protecting and Activating Group

Received: 2 June 2009; Accepted: 25 June 2009 / Published: 29 June 2009
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract: The preparation of 5-bromo-2-naphthol (4) in three steps from 5-amino-2-naphthol (1) is described. A sulfonic acid group is introduced at the 1-position as an activating and protecting group for the Sandmeyer reaction. The sulfonate group allows for the use of only water and sulfuric acid as solvents. The sulfonic acid is introduced with three equivalents of sulfuric acid, and it is removed in 20% aq. sulfuric acid.
Keywords: Sandmeyer reaction; protecting group; sulfonation; desulfonation
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MDPI and ACS Style

Everett, R.; Hamilton, J.; Abelt, C. Preparation of 5-Bromo-2-naphthol: The Use of a Sulfonic Acid as a Protecting and Activating Group. Molbank 2009, 2009, M602.

AMA Style

Everett R, Hamilton J, Abelt C. Preparation of 5-Bromo-2-naphthol: The Use of a Sulfonic Acid as a Protecting and Activating Group. Molbank. 2009; 2009(3):M602.

Chicago/Turabian Style

Everett, Renata; Hamilton, Jillian; Abelt, Christopher. 2009. "Preparation of 5-Bromo-2-naphthol: The Use of a Sulfonic Acid as a Protecting and Activating Group." Molbank 2009, no. 3: M602.

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