Photochromic naphtho [2,1-b]pyran compounds containing bithienyl or terthienyl substituents, process for their manufacture, and photochromic materials and articles obtained
COMPOSES PHOTOCHROMIQUES NAPHTO[2,1-B]PYRANES A SUBSTITUTIONS BI OU TERTHIENYLE
申请人:ESSILOR INTERNATIONAL COMPAGNIE GENERALE D'OPTIQUE
公开号:EP1204714B1
公开(公告)日:2004-01-28
US6312811B1
申请人:——
公开号:US6312811B1
公开(公告)日:2001-11-06
Photochromic naphtho [2,1-b]pyran compounds containing bithienyl or terthienyl substituents, process for their manufacture, and photochromic materials and articles obtained
申请人:Essilor International Compagnie Generale d'Optique
公开号:US06312811B1
公开(公告)日:2001-11-06
The photochromic compounds of the invention correspond to the formula:
in which Th2 represents a bithienyl group in one of the positions 5 to 10 of the naphthenic ring system system, R1 denotes a bithienyl or trithienyl group and R2 denotes a bithienyl, trithienyl, aryl, naphthyl, thienyl, furyl, pyrrolyl or N-alkylpyrrolyl group.