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HfCl4–phosphoric acid catalyzed reduction of in situ generated carbocations with hydrosilane: facile approaches to 2,4-dihydrocyclopenta[b]indoles
Organic Chemistry Frontiers ( IF 4.6 ) Pub Date : 2024-07-16 , DOI: 10.1039/d4qo00874j
Man Wang 1 , Junyan Zhao 1 , Junda Zhao 1 , Ran Song 1 , Daoshan Yang 1 , Long Zhang 2 , Jian Lv 1
Affiliation  

A binary-acid complex HfCl4/diphenyl phosphate PA could promote in situ generation of stabilized carbocations from γ-indolyl-β,γ-unsaturated α-keto esters, and they were further reduced by hydrosilane (e.g., PhMe2SiH). Under mild conditions, the reaction afforded 2,4-dihydrocyclopenta[b]indoles in up to 90% yield.

中文翻译:


HfCl4-磷酸催化氢硅烷还原原位生成的碳阳离子:制备 2,4-二氢环戊[b]吲哚的简便方法



二元酸络合物 HfCl 4 /磷酸二苯酯 PA 可以促进 γ-吲哚基-β,γ-不饱和 α-酮酯原位生成稳定的碳正离子,并且它们可以被氢硅烷进一步还原(例如, PhMe 2 SiH)。在温和条件下,反应得到2,4-二氢环戊[b]吲哚,产率高达90%。
更新日期:2024-07-16
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