Enantiodivergent Synthesis of Allenes by Point-to-Axial Chirality Transfer.

Enantiodivergent Synthesis of Allenes by Point-to-Axial Chirality Transfer.
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DOI:
10.1002/anie.201804446
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发表时间:
2018-07-02
期刊:
Angewandte Chemie (International ed. in English)
影响因子:
--
通讯作者:
Aggarwal VK
Aggarwal VK
中科院分区:
其他
文献类型:
--
作者:
Armstrong RJ;Nandakumar M;Dias RMP;Noble A;Myers EL;Aggarwal VK

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An enantiodivergent method for the synthesis of multiply substituted allenes is described. Highly enantioenriched, point‐chiral boronic esters were synthesized by homologation of α‐seleno alkenyl boronic esters with lithiated carbamates and eliminated to form axially chiral allene products. By employing either oxidative or alkylative conditions, both syn and anti elimination could be achieved with complete stereospecificity. The process enables the synthesis of either M or P allenes from a single isomer of a point‐chiral precursor and can be employed for the enantioselective assembly of di‐, tri‐, and tetrasubstituted allenes.
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