Metal‐Free [3,3]‐Sigmatropic Rearrangement/[3+2] Annulation Cascade of N ‐Phenoxy Amides with Terminal Alkynes for the Diastereoselective Synthesis of trans ‐Dihydrobenzofurans

2019 ◽  
Vol 361 (17) ◽  
pp. 3980-3985 ◽  
Author(s):  
Fu‐Xiaomin Liu ◽  
Weijie Chen ◽  
Guoxun Zhu ◽  
Zhi Zhou ◽  
Hui Gao ◽  
...  
Keyword(s):  
Sigmatropic Rearrangement ◽  
Terminal Alkynes ◽  
Diastereoselective Synthesis ◽  
Metal Free

Regio- and diastereoselective synthesis of trans-3,4-diaryldihydrocoumarins via metal-free [4+2] annulation of ynamides with o-hydroxybenzyl alcohols

2021 ◽  
Author(s):  
Wen-Feng Luo ◽  
Long-Wu Ye ◽  
Long Li ◽  
Peng-Cheng Qian
Keyword(s):  
Diastereoselective Synthesis ◽  
Metal Free

An efficient regio- and diastereoselective method for the construction of valuable trans-3,4-diaryldihydrocoumarins via metal-free formal [4+2] annulation of ynamides with o-hydroxybenzyl alcohols has been developed.

A Formal Metal-Free γ-Arylation of 1,3-Dicarbonyl Compounds via a Sequence of Isomerization/1,4-Addition/[3,3]-Sigmatropic Rearrangement

2021 ◽  
Author(s):  
Shi-Chao Lu ◽  
Fuqiang Wen ◽  
Xidong Guan
Keyword(s):  
Sigmatropic Rearrangement ◽  
Mechanistic Studies ◽  
Dicarbonyl Compounds ◽  
Metal Free

A metal-free redox arylation of alkynes with sulfoxides has been developed to provide an unconventional access to diverse γ-arylated 1,3-dicarbonyl compounds in an atom-economical manner. Mechanistic studies suggest that a...

Metal-free gem selective dimerization of terminal alkynes catalyzed by a pyridonate borane complex

2019 ◽  
Vol 9 (10) ◽  
pp. 2438-2444 ◽  
Author(s):  
Max Hasenbeck ◽  
Tizian Müller ◽  
Urs Gellrich
Keyword(s):  
Terminal Alkynes ◽  
Metal Free ◽  
Dimerization Of Alkynes

The metal-free dimerization of alkynes catalyzed by a pyridonate borane complex via a 1,2-carboration is reported.

Metal-Free Amidation Reactions of Terminal Alkynes with Benzenesulfonamide

2019 ◽  
Vol 84 (6) ◽  
pp. 3176-3183 ◽  
Author(s):  
Sachinta Mahato ◽  
Sougata Santra ◽  
Grigory V. Zyryanov ◽  
Adinath Majee
Keyword(s):  
Terminal Alkynes ◽  
Metal Free

Metal-free synthesis of alkynyl alkyl selenides via three-component coupling of terminal alkynes, Se, and epoxides

2018 ◽  
Vol 20 (7) ◽  
pp. 1560-1563 ◽  
Author(s):  
Ge Wu ◽  
Lin Min ◽  
Hongchen Li ◽  
Wenxia Gao ◽  
Jinchang Ding ◽  
...  
Keyword(s):  
Formation Process ◽  
Bond Formation ◽  
Coupling Reaction ◽  
Terminal Alkynes ◽  
Metal Free ◽  
Three Component Coupling

A metal-free three-component coupling reaction of alkynes, Se powder and epoxides is described, providing an efficient, straightforward route for the preparation of alkynyl alkyl selenides via a double C–Se bond formation process.

Transition-metal-free sp3 C–H activation of 2-methylquinoline with terminal alkynes for synthesis of 3-(quinolin-2-yl)isoxazoles

2019 ◽  
Vol 60 (21) ◽  
pp. 1443-1447 ◽  
Author(s):  
Lei Meng ◽  
Shuwei Zhang ◽  
Xiaodong Jia ◽  
Liangzhong Lv ◽  
Yu Yuan
Keyword(s):  
Transition Metal ◽  
Terminal Alkynes ◽  
Metal Free

Metal-free synthesis of biaryls from aryl sulfoxides and sulfonanilides via sigmatropic rearrangement

Tetrahedron ◽  
2020 ◽  
Vol 76 (51) ◽  
pp. 131232 ◽  
Author(s):  
Akira Yoshida ◽  
Koichi Okamoto ◽  
Tomoyuki Yanagi ◽  
Keisuke Nogi ◽  
Hideki Yorimitsu
Keyword(s):  
Sigmatropic Rearrangement ◽  
Metal Free
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