TiCl₄, Dioxane—A Facile and Efficient System for De-O-Benzylation, De-O-Allylation, and De-O-Xylylation of Phenolic Ethers

Abstract

Simultaneous de-O-xylylation and reductive coupling was observed when 1 equiv. of the dialdehyde 2a/2b was treated with 5 equiv. of each TiCl₄ and Zinc which lead to the development of TiCl₄ in dioxane as a new system for the facile deprotection of phenolic ethers 4a–4d, 5a–5d, and 6a–6c.

Acknowledgment

The authors thank Ms. P. Vasumathi for her help during this investigation. VM thanks CSIR, New Delhi for financial assistance and the authors thank DST, New Delhi and UGC-SAP for financial assistance.