Total synthesis and structural revision of the piperarborenines via sequential cyclobutane C-H arylation.
Total synthesis and structural revision of the piperarborenines via sequential cyclobutane C-H arylation.
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DOI:
10.1021/ja209205x
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发表时间:
2011-11-30
影响因子:
15
通讯作者:
Baran, Phil S.
中科院分区:
文献类型:
--
作者:
Gutekunst, Will R.;Baran, Phil S.
A strategy for the construction of unsymmetrical cyclobutanes using C–H functionalization logic is demonstrated in the total synthesis of piperarborenine B and piperarborenine D (reported structure). These syntheses feature a new preparation of cis-cyclobutane dicarboxylates from commercially available coumalate starting materials and a divergent approach to the controlled cis or trans installation of the two distinct aryl rings found in the natural products using the first example of cyclobutane C–H arylation. The structure of piperarborenine D is reassigned to a head-to-head dimer, which was synthesized using an intramolecular [2+2] photocycloaddition strategy.
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影响因子:
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影响因子:
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