The Phospha-Bora-Wittig Reaction.
The Phospha-Bora-Wittig Reaction.
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DOI:
10.1021/jacs.1c06228
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发表时间:
2021-09-08
影响因子:
15
通讯作者:
Cowley MJ
中科院分区:
文献类型:
--
作者:
Borys AM;Rice EF;Nichol GS;Cowley MJ
We report the phospha-bora-Wittig reaction for the direct preparation of phosphaalkenes from aldehydes, ketones, esters, or amides. The transient phosphaborene Mes*P=B–NR2 reacts with carbonyl compounds to form 1,2,3-phosphaboraoxetanes, analogues of oxaphosphetane intermediates in the classical Wittig reaction. 1,2,3-Phosphaboraoxetanes undergo thermal or Lewis acid-promoted cycloreversion, yielding phosphaalkenes. Experimental and density functional theory studies reveal far-reaching similarities between classical and phospha-bora-Wittig reactions.
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