biostudies-literatureZhang JChinese Academy of SciencesNational Natural Science Foundation of ChinaNatural Science Foundation of Jiangsu Province1070-1074https://www.ebi.ac.uk/biostudies/studies/S-EPMC6346396biostudies-literatureUnknown10(4)A practical and readily scalable reaction sequence was developed for the straightforward synthesis of a new family of larger π-conjugated naphthopyrans by a Brønsted acid-catalyzed aromatic annulation of alkoxyallenes with inert naphthols. The cascade pathway involves allylation/cyclization/debenzyloxylation/isomerization/dehydration. The new class of solid state diphenylmethylene substituted naphthopyrans are fluorescent emissive and proved to have aggregation-induced emission (AIE) behavior.Chemical scienceBronsted acid-catalyzed aromatic annulation of alkoxyallenes with naphthols: a reaction sequence to larger π-conjugated naphthopyrans with aggregation-induced emission characters.PMC634639621202175BK2016039621602231Yang HShen KZhang JZhu LJiang GHang XCfalseBronsted acid-catalyzed aromatic annulation of alkoxyallenes with naphthols: a reaction sequence to larger π-conjugated naphthopyrans with aggregation-induced emission characters.A practical and readily scalable reaction sequence was developed for the straightforward synthesis of a new family of larger π-conjugated naphthopyrans by a Brønsted acid-catalyzed aromatic annulation of alkoxyallenes with inert naphthols. The cascade pathway involves allylation/cyclization/debenzyloxylation/isomerization/dehydration. The new class of solid state diphenylmethylene substituted naphthopyrans are fluorescent emissive and proved to have aggregation-induced emission (AIE) behavior.2019-01-01T00:00:00Z2019 Jan2025-04-04T18:57:39.889Z2019-03-26T22:55:11ZS-EPMC63463963077490310.1039/c8sc03837f