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    • 1. 发明授权
    • Photochromic pyran compounds
    • 光致变色吡喃化合物
    • US06683709B2
    • 2004-01-27
    • US10067529
    • 2002-02-07
    • Claudia MannUdo WeigandManfred Melzig
    • Claudia MannUdo WeigandManfred Melzig
    • C07D49310
    • G02B5/23C07D311/92
    • Photochromic pyran compounds and their use in synthetic resin objects of all types, especially for ophthalmic applications, particularly spiro compounds having a fluorene structure derived from naphthopyrans, which are known as spirofluorenopyrans. By introducing respectively only one strongly electron donating or withdrawing group at specific positions in the periphery of the pyran dye, photochromic compounds obtained which in the excited state are distinguished by an expanded color spectrum, while simulataneously offering comparably good bleaching rates and good durability.
    • 光致变色吡喃化合物及其在所有类型的合成树脂物体中的用途,特别是用于眼科应用,特别是具有衍生自萘并芴的芴结构的螺环化合物,其被称为螺芴吡喃。 通过在吡喃染料的周围的特定位置分别仅引入一个强电子给予或取出基团,在激发状态下获得的光致变色化合物通过扩展的色谱来区分,同时提供相当好的漂白率和良好的耐久性。