Facile Construction of the Benzofuran and Chromene Ring Systems via Pd<sup>II</sup>-Catalyzed Oxidative Cyclization
作者:So Won Youn、Jeong Im Eom
DOI:10.1021/ol051264z
日期:2005.7.1
text]. We herein report the development of one-pot procedures for the conversion of allyl aryl ethers to 2-methylbenzofurans (via sequential Claisenrearrangement and oxidative cyclization) and for the conversion of aryl homoallyl ethers to chromenes (via direct oxidative cyclization). It is likely that both reactions proceed via a common Pd-catalyzed pathway involving olefin activation, nucleophilic
Thermal Claisen rearrangement of aryl allenylmethyl ethers: synthesis of 2-(o-hydroxyaryl)buta-1,3-dienes and 4-methyl-2H-1-benzopyrans
作者:T. Balasubramanian、K. K. Balasubramanian
DOI:10.1039/c39920001760
日期:——
Thermal Claisen rearrangement of aryl allenylmethyl ethers in diethylene glycol afforded 2-(o-hydroxyaryl)buta-1,3-dienes and 4-methyl-2H-1-benzopyrans in good yield.
Mercury(II) trifluoroacetate-mediated cyclisation of aryl allenic ethers
作者:T. Balasubramanian、K.K. Balasubramanian
DOI:10.1016/0040-4039(91)80243-y
日期:1991.11
Mercury(II) trifluoroacetate brings about a facile cyclisation of aryl allenic(aryl 2,3-butadien-1-yl) ethers to 4-methyl-2H-1-benzopyrans and 4-methylene-3,4-dihydro-2H-1-benzopyrans in excellent yield.