Diastereoselective Substitution Reactions of Acyclic β-Alkoxy Acetals via Electrostatically Stabilized Oxocarbenium Ion Intermediates.

Diastereoselective Substitution Reactions of Acyclic β-Alkoxy Acetals via Electrostatically Stabilized Oxocarbenium Ion Intermediates.
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DOI:
10.1021/acs.orglett.2c01004
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发表时间:
2022-05-06
期刊:
影响因子:
5.2
通讯作者:
Woerpel, K. A.
Woerpel, K. A.
中科院分区:
化学1区
文献类型:
--
作者:
Ramdular, Amanda;Woerpel, K. A.

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Substitution reactions of acyclic β-alkoxy acetals proceeded with generally high diastereoselectivities (>90:10) to form the anti product. Mechanistic experiments supplemented with computational studies suggest that, upon activation of the acetal, the resulting oxocarbenium ion is electrostatically stabilized by the β-alkoxy group. This stabilization defines the conformation of the reactive intermediate, which can be attacked preferentially from the more exposed face, leading to the observed products.
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