Synthesis of functionalized tetrahydropyrans via cascade cycloaddition involving silyloxyallyl cation intermediates.
Synthesis of functionalized tetrahydropyrans via cascade cycloaddition involving silyloxyallyl cation intermediates.
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DOI:
10.1039/d0cc01796e
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发表时间:
2020-05-07
期刊:
影响因子:
--
通讯作者:
Kartika R
中科院分区:
文献类型:
--
作者:
Badmus FO ;Malone JA ;Fronczek FR ;Kartika R
An expedient synthesis of highly substituted tetrahydrobenzofuran via unsymmetrical silyloxyallyl cation is reported. Conveniently generated under catalytic Brønsted acid conditions, nucleophilic capture of this reactive intermediate with silylenolate, followed by cascade Paal-Knorr cyclization in the presence of tosic acid monohydrate effectively constructed the tetrahydrobenzofuran core in a single synthetic step operation.
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