Synthesis and reactivity of formyl-subst
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Karine Chamontin; Vladimir Lokshin; Valérie Rossollin; André Samat; Robert Gugli
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Article
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1999
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Elsevier Science
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French
⚖ 549 KB
Synthetic accesses to formylated photochromic 3,3-diphenyl-[3H]-naphthopyrans (or 2/-/benzochromenes) are developed through classical cyclization between appropriate hydroxynaphthaldehydes and l,l-diphenylpropyne-l-ol and also via substituent Wansfonnations on the naphthopyran skeleton including bro