A gold(<scp>i</scp>)-catalyzed intramolecular tandem cyclization reaction of alkylidenecyclopropane-containing alkynes
作者:Wei Fang、Yin Wei、Min Shi
DOI:10.1039/c7cc07042j
日期:——
moderate to good yields. The further transformations as well as application of the product have been presented and a plausible reaction mechanism has been also proposed on the basis of deuteriumlabeling and control experiments.
Catalytic silicon‐carbon or silicon‐heteroatom bond‐forming hydrosilylation has become increasingly important in synthetic chemistry, catalysis and organosilicon chemistry. Herein we report a platinum‐catalyzed one‐pot and tandem hydrosilylation/cyclization of OH‐containing alkynes with dihydrosilanes, allowing for facile synthesis of six‐membered organosiliconcompounds, including silyloxycycles and
A concise synthesis of 10-benzoyl-3,4-dihydroanthracen-1(2<i>H</i>)-one derivatives catalyzed by TfOH under metal-free conditions
作者:Hao Wu、Hua-Dong Chen、Jian-Quan Liu、Qiu-Yan Li、Xiang-Shan Wang
DOI:10.1080/00397911.2021.1912355
日期:2021.6.18
Abstract TfOH was proved to be an efficient catalyst to promote the intra-molecular cyclization, Diels-Alder reaction, deprotonation and dehydration, and provided a concise synthesis of 10-benzoyl-3,4-dihydroanthracen-1(2H)-ones in good yields from a reaction of 2-(phenylethynyl) benzaldehyde and cyclohexane-1,3-dione. It underwent in high regioselectivity when center asymmetrical 4,4-dimethylcyclohexane-1
A Cascade synthesis of 11
<i>bH</i>
‐Imidazo[1,2‐
<i>c</i>
]isoquinolino[2,1‐
<i>a</i>
]quinazoline derivatives catalyzed by AgOTf
作者:Hao Wu、Yi‐Chun Wang、Tuan‐Jie Li、Jian‐Quan Liu、Xiang‐Shan Wang
DOI:10.1002/jhet.3940
日期:2020.5
A cascade reaction of 2‐alkynylbenzaldehydes and 2‐(4,5‐diphenyl‐1H‐imidazol‐2‐yl)aniline was treated in DMF catalyzed by AgOTf leading to 6,13,14‐triaryl‐11bH‐imidazo[1,2‐c] isoquinolino[2,1‐a]quinazolines in high yields. This Domino reaction included condensation, cyclization, and acetylenic hydroamination under mild conditions to build fused pentacyclic heterocycle with three new bonds and two new
2- alkynylbenzaldehydes和2-(4,5-二苯基-1-甲级联反应ħ -咪唑-2-基)苯胺在DMF处理催化通过的AgOTf导致6,13,14三芳基11 BH咪唑并[1,2 ,2− c ]异喹啉代[2,1− a ]喹唑啉,高产。该多米诺反应包括在温和条件下的缩合,环化和炔属加氢胺化反应,以形成具有三个新键和两个新环的稠合五环杂环。
An efficient synthesis of 6‐arylpyrazolo[4′,3′:4,5]pyrimido[2,1‐a] isoquinolin‐8(9
<i>H</i>
)‐one derivatives catalyzed by AgOTf
作者:Wan‐Chen Pan、Tuan‐Jie Li、Jian‐Quan Liu、Xiang‐Shan Wang
DOI:10.1002/jhet.4428
日期:2022.5
A new AgOTf-catalyzed domino reaction of 2-alkynylbenzaldehyde and 4-amino-1-methyl-3-propyl-1H-pyrazole-5-carboxamide has been reported via a sequential condensation, cyclization, and acetylenic hydroamination process. The developed protocol provides an efficient and modular access to a range of new fused tetracyclic heterocycle 6-aryl-9-methyl-11-propyl pyrazolo[4′,3′:4,5]pyrimido[2,1-a]isoquinolin-8(9H)-ones
已经报道了一种新的 AgOTf 催化的 2-炔基苯甲醛和 4-氨基-1-甲基-3-丙基-1 H-吡唑-5-甲酰胺的多米诺反应,通过顺序缩合、环化和炔烃加氢胺化过程。所开发的协议提供了对一系列新稠合四环杂环 6-aryl-9-methyl-11-丙基吡唑并[4',3':4,5]嘧啶并[2,1- a ]异喹啉- 8(9 H )-具有两个新环的高产率。