Facile One-Pot Synthesis of Photochromic Pyrans
- 1 October 2003
- journal article
- research article
- Published by American Chemical Society (ACS) in Organic Letters
- Vol. 5 (22) , 4153-4154
- https://doi.org/10.1021/ol035599x
Abstract
Photochromic pyrans, including [3H]naphtho[2,1-b]pyrans, [2H]naphtho[1,2-b]pyrans, indeno-fused naphtho[1,2-b]pyrans, and heteroannulated pyrans, were synthesized in excellent yields through a facile one-pot procedure by reaction of propargyl alcohol and naphthol or phenol derivatives in the presence of 5 mol % PPTS and 2 equiv of (MeO)3CH. Symmetrical and nonsymmetrical bispyrans can also be prepared using the protocol.Keywords
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