Pham VC, Chavasiri W, Radtanajiravong L. Naturally occurring phytic acid: an advanced Brønsted acid catalyst for direct amination reactions of allylic alcohols.
Org Biomol Chem 2024;
22:2307-2312. [PMID:
38410077 DOI:
10.1039/d3ob02118a]
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Abstract
Phytic acid is abundant in various plant-based foods and is considered agricultural waste. Here, we demonstrate the effectiveness of this organophosphorus acid as a sustainable catalyst for the direct amination reactions of allylic alcohols. This approach is successfully performed in air using technical grade solvents, affording allylanilines in moderate to excellent yields. Challenging electron-rich anilines react effectively, and their corresponding Friedel-Crafts side products can be minimised under the optimised reaction conditions. A variety of asymmetrically substituted allylic alcohols are tolerated, while the scope is extended to amide, and C-, O- and S-nucleophiles.
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