Convenient synthesis of naphthopyrans using montmorillonite K-10 as heterogeneous catalyst

Journal of Chemical Sciences

Zahra Lasemi⁴  Maryam Mohadjerani³  Mohammad Reza Naimi-Jamal²  Mohammad Javad Ardestanian¹  Rahman Hosseinzadeh1¹ 

[1] Faculty of Chemistry, Department of Organic Chemistry, University of Mazandaran, Babolsar, Iran$$;Department of Chemistry, Iran University of Science & Technology, Naarmak, 16846-11367 Tehran, Iran$$;Department of Molecular and Cell Biology, Faculty of Basic Sciences, University of Mazandaran, Babolsar, Iran$$;Department of Chemistry, Firoozkooh Branch, Islamic Azad University, Firoozkooh, Iran$$

关键词: Naphthopyran;    propargylic alcohols;    naphthol;    montmorillonite K-10.;   

DOI  :  

来源: Indian Academy of Sciences

【 摘 要 】

A simple and mild procedure for the synthesis of different naphthopyrans providing high yields in a short reaction time was reported. The reaction of propargylic alcohols with 𝛼- or 𝛽-naphthol and dihydroxy naphthalenes in the presence of montmorillonite K-10 was studied. This reaction afforded high yields of the corresponding naphthopyrans. In addition, a number of new phenylene and biphenylen-linked bisnaphthopyrans were synthesized providing excellent yields via the one-pot reaction of bis-propargyl alcohols with 𝛽-naphthol.

【 授权许可】

Unknown