title: Water-triggered, counter-anion-controlled, and silver-phosphines complex-catalyzed stereoselective cascade alkynylation/cyclization of terminal alkynes with salicylaldehydes.
abstract: A highly efficient alkynylation-cyclization of terminal alkynes with salicylaldehydes leading to substituted 2,3-dihydrobenzofuran-3-ol derivatives was developed by using Cy(3)P-silver complex as catalyst in water. Counter anions in the silver complex proved to be the key factor to Z/E stereoselectivity control. Aurones can also be obtained effectively from the cascade reaction followed by oxidation without further purification.
authors.affiliation: Department of Applied Chemistry, School of Material Science and Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, PR China.
authors.forename: Min
authors.initials: M
authors.lastname: Yu
authors.forename: Rachid
authors.initials: R
authors.lastname: Skouta
authors.forename: Lei
authors.initials: L
authors.lastname: Zhou
authors.forename: Huan-feng
authors.initials: HF
authors.lastname: Jiang
authors.forename: Xiaoquan
authors.initials: X
authors.lastname: Yao
authors.forename: Chao-Jun
authors.initials: CJ
authors.lastname: Li