Cordier, Pierre published the artcileSilver and Bronsted Acid Catalyzed Nazarov-Type Cyclizations To Generate Benzofulvenes, Computed Properties of 27943-46-0, the publication is Angewandte Chemie, International Edition (2009), 48(46), 8757-8760, S8757/1-S8757/34, database is CAplus and MEDLINE.
A general method for the preparation of benzofulvenes from diaryl α-hydroxyallenes is reported. For monosubstituted allenes ZnCl2 was the best catalysts, whereas for di- and tetrasubstituted allenes AgOTf, TfOH, and H3PMo12O40 gave better results. When two Ph groups were present, the regioselectivity could be controlled by ortho substituents. The thienyl group proved to be more reactive than Ph groups.
Angewandte Chemie, International Edition published new progress about 27943-46-0. 27943-46-0 belongs to tetrahydropyran, auxiliary class Tetrahydropyran,Alkynyl,Ether, name is 2-((2-Methylbut-3-yn-2-yl)oxy)tetrahydro-2H-pyran, and the molecular formula is C10H16O2, Computed Properties of 27943-46-0.
Referemce:
https://en.wikipedia.org/wiki/Tetrahydropyran,
Tetrahydropyran – an overview | ScienceDirect Topics