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Gold-catalyzed π-directed regioselective cyclization of bis(o-alkynyl benzyl alcohols): rapid access to dihydroisobenzofuran derivatives†
Ziping Cao,Shan Li,Jie Li,Xin Meng,Huaqing Zhang,Xuejun Sun,Jinmao You
New Journal of Chemistry Pub Date : 08/31/2016 00:00:00 , DOI:10.1039/C6NJ02066F
Abstract

Herein we demonstrate a gold-catalyzed regio- and stereo-selective cycloisomerization of bis(o-alkynyl benzyl alcohols). By this protocol, the synthesis of dihydroisobenzofuran derivatives can be achieved in good yields. The reaction features a continuous alkyne/alkene-directed 5-exo-dig cyclization and a Prins-type cyclization for the formation of three cycles.

Graphical abstract: Gold-catalyzed π-directed regioselective cyclization of bis(o-alkynyl benzyl alcohols): rapid access to dihydroisobenzofuran derivatives
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