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ChemInform Abstract: Furo-Fused 2H-Chromenes: Synthesis and Photochromic Properties.

✍ Scribed by J.-L. POZZO; A. SAMAT; R. GUGLIELMETTI; V. LOKSHIN; V. MINKIN

Publisher
John Wiley and Sons
Year
2010
Weight
29 KB
Volume
28
Category
Article
ISSN
0931-7597

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✦ Synopsis

Furo-Fused 2H-Chromenes: Synthesis and Photochromic Properties.

-Two alternative approaches for the synthesis of furo-fused chromenes ( III) and (IV) starting from hydroxybenzofurans (I) are given. All the new chromenes exhibit photochromic behavior at room temperature. -(POZZO,

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## Abstract The synthesis and the photochromic properties of new photochromic 6,7‐ and 7,8‐benzoindene annellated benzopyrans are described. When compared to parent indeno‐fused 2__H__‐chromenes (2__H__‐[1]benzopyrans), compounds **10** and **12** exhibit a significant bathochromic shift of maximum