The present invention provides a compound represented by the formula (I):
wherein each symbol is as defined in the specification, or a salt thereof.
本发明提供了一种由以下公式(I)表示的化合物:其中每个符号如规范中定义的,或其盐。
US9133129B2
申请人:——
公开号:US9133129B2
公开(公告)日:2015-09-15
Gold-catalyzed cycloisomerization of alk-4-yn-1-ones
作者:Volker Belting、Norbert Krause
DOI:10.1039/b819704k
日期:——
Depending on the substitution pattern and the solvent, the gold-catalyzed cyclization of alk-4-yn-1-ones 1 affords different oxygen heterocycles under mild reaction conditions. Alkynones with one substituent at C-3 undergo a 5-exo-dig cycloisomerization to substituted furans 2, whereas a 6-endo-digcyclization to 4H-pyrans 3 is observed with substrates bearing two substituents at C-3. In alcoholic solvents