- Versatile synthesis of Phospholides from open-chain precursors. application to annelated pyrrole- and silole-phosphole rings
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Phospholides are easily obtained by treatment of the open-chain acetylenic phosphines shown by an excess of lithium at room temperature in THF (12 examples).
- Xu, Youzhi,Wang, Zhihua,Gan, Zhenjie,Xi, Qiuzhen,Duan, Zheng,Mathey, Fran?ois
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- Gold-Catalyzed Cascade and Divergent Synthesis of Indolobenzazepines and Indoloquinolines from Nitrogen-Tethered 1,8-Diynes
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We describe the divergent construction of two nitrogen-containing polycyclic systems by gold-catalyzed cycloisomerizations. The gold-catalyzed cascade hydroamination and 7-endo-dig-selective cycloisomerization of nitrogen-tethered 1,8-diynes yielded indol
- Ito, Mamoru,Onoda, Hideaki,Shibata, Takanori,Takaki, Asahi
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supporting information
(2022/01/22)
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- Construction of Six-Membered Silacyclic Skeletons via Platinum-Catalyzed Tandem Hydrosilylation/Cyclization with Dihydrosilanes
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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 organosilicon compounds, including silyloxycycles and cyclic siloxanes in high yields and with good stereoselectivities. (Figure presented.).
- Long, Peng-Wei,Bai, Xing-Feng,Ye, Fei,Li, Li,Xu, Zheng,Yang, Ke-Fang,Cui, Yu-Ming,Zheng, Zhan-Jiang,Xu, Li-Wen
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supporting information
p. 2825 - 2830
(2018/08/17)
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- DDQ-Mediated Oxidative Radical Cycloisomerization of 1,5-Diynols: Regioselective Synthesis of Benzo[b]fluorenones under Metal-Free Conditions
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A regio- and chemoselective oxidative cycloisomerization reaction of acyclic 1,5-diynols has been developed. The reaction proceeds under metal-free reaction conditions with high efficiency and broad functional group tolerance, which offers a general and straightforward access to benzo[b]fluorenones under metal-free conditions. The preliminary mechanistic studies revealed the possible involvement of a Meyer-Schuster rearrangement combined with an oxidative radical cyclization.
- Zhu, Hui,Chen, Zhiyuan
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supporting information
p. 488 - 491
(2016/02/18)
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- Copper-catalyzed tandem synthesis of indolo-, pyrrolo[2,1-a]isoquinolines, naphthyridines and bisindolo/pyrrolo[2,1-a]isoquinolines via hydroamination of ortho-haloarylalkynes followed by C-2 arylation
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An efficient approach for the copper-catalyzed regioselective tandem synthesis of diversely substituted indolo[2,1-a]isoquinolines 11a-r, pyrrolo[2,1-a]isoquinolines 12a-d, and indolo-, pyrrolo[2,1-f ][1,6]naphthyridines 14a-f via preferential addition of the heterocyclic amines onto the ortho-haloarylalkynes over N-arylation followed by intramolecular C-2 arylation is described. The scope of the developed chemistry was successfully extended for the direct synthesis of bisindolo-, pyrrolo[2,1-a]isoquinolines 15a-g, a regioisomer of the bisindolo[1,2-a]quinolines used as organic single-crystal field-effect transistor. Hydroxymethyl benzotriazole, which is an inexpensive and air stable compound, has been used as a ligand to carry out this onestep conversion of simple, readily available starting materials into an interesting class of heterocyclic compounds.
- Verma, Akhilesh K.,Jha, Rajeev R.,Chaudhary, Ritu,Tiwari, Rakesh K.,Reddy, Kotla Siva K.,Danodia, Abhinandan
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p. 8191 - 8205,15
(2020/10/15)
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