Highly regioselective synthesis of 2,3-disubstituted 2H-1-benzopyrans: Brønsted acid catalyzed [4+2] cycloaddition reaction with a variety of arylalkynes via ortho-quinone methides

Highly regioselective synthesis of 2,3-disubstituted 2H-1-benzopyrans: Brønsted acid catalyzed [4+2] cycloaddition reaction with a variety of arylalkynes via ortho-quinone methides

Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Tetrahedron - Volume 73, Issue 45, 9 November 2017, Pages 6456-6464

Kenta Tanaka, Mayumi Sukekawa, Yosuke Shigematsu, Yujiro Hoshino, Kiyoshi Honda,