Lewis acid catalyst-steered divergent synthesis of functionalized vicinal amino alcohols and pyrroles from tertiary enamides
Lewis acid catalyst-steered divergent synthesis of functionalized vicinal amino alcohols and pyrroles from tertiary enamides
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路易斯酸催化剂引导叔烯酰胺发散合成官能化邻位氨基醇和吡咯
DOI:
10.1039/c8qo00839f
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发表时间:
2018-10
期刊:
影响因子:
--
通讯作者:
Mei-Xiang Wang
中科院分区:
文献类型:
--
作者:
Xin-Ming Xu;Chuan-Hu Lei;Shuo Tong;Jieping Zhu;Mei-Xiang Wang
We report herein two Lewis acid catalyst-steered distinct reaction pathways of N-formylmethyl tertiary enamides. In the presence of a catalytic amount of AlCl3 and 4 A molecular sieves, the stable N-formylmethyl tertiary enamides underwent sequential reactions involving intramolecular nucleophilic addition of tertiary enamides to aldehydes, isomerization and dehydration aromatization to produce diversely polysubstituted pyrroles in excellent yields. However, the Sc(OTf)3-catalyzed reaction of the same tertiary enamides proceeded through, after the initial enaminic addition to aldehydes, hydration of the cyclic iminium intermediates and the ring opening reaction to furnish functionalized vicinal amino alcohol derivatives in 40%–84% yields. The synthetic utility of the method was further demonstrated by the gram-scale preparation of di- and tri-substituted pyrroles and 1-acetyl-4,5,6,7-tetrahydro-1H-indole, and by a facile transformation of a functionalized pyrrole into 5H-pyrrolo[2,1-a]isoindol-5-one.
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影响因子:
--
作者:
Shuo Tong;De‐Xian Wang;Liang Zhao;Jieping Zhu;Mei-Xiang Wang
通讯作者:
Shuo Tong;De‐Xian Wang;Liang Zhao;Jieping Zhu;Mei-Xiang Wang
影响因子:
5.2
作者:
Luo Yang;G. Deng;De‐Xian Wang;Zhi-tang Huang;Jieke Zhu;Mei-Xiang Wang
通讯作者:
Luo Yang;G. Deng;De‐Xian Wang;Zhi-tang Huang;Jieke Zhu;Mei-Xiang Wang
影响因子:
3.2
作者:
Wesley J Olivier;Jason A. Smith;Alex C. Bissember
通讯作者:
Wesley J Olivier;Jason A. Smith;Alex C. Bissember
影响因子:
1.8
作者:
Xingyi Zhang;Xin-Ming Xu;Liang Zhao;J. You;Jieping Zhu;Mei-Xiang Wang
通讯作者:
Xingyi Zhang;Xin-Ming Xu;Liang Zhao;J. You;Jieping Zhu;Mei-Xiang Wang
影响因子:
3.6
作者:
Chachignon, Helene;Scalacci, Nicolo;Castagnolo, Daniele
通讯作者:
Castagnolo, Daniele