Metal-Free Iodosulfonylation of Internal Alkynes: Stereodefined Access to Tetrasubstituted Olefins

2017 ◽  
Vol 359 (16) ◽  
pp. 2847-2856 ◽  
Author(s):  
Ravi Kumar ◽  
Vikas Dwivedi ◽  
Maddi Sridhar Reddy
Keyword(s):  
Metal Free ◽  
Internal Alkynes ◽  
Tetrasubstituted Olefins

K2S2O8-mediated metal-free direct P–H/C–H functionalization: a convenient route to benzo[b]phosphole oxides from unactivated alkynes

2016 ◽  
Vol 18 (12) ◽  
pp. 3522-3526 ◽  
Author(s):  
Dumei Ma ◽  
Weizhu Chen ◽  
Gaobo Hu ◽  
Yun Zhang ◽  
Yuxing Gao ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Contamination ◽  
Heavy Metal Contamination ◽  
Radical Addition ◽  
Metal Free ◽  
Internal Alkynes ◽  
Convenient Route

A metal-free and K2S2O8-mediated radical addition/cyclization of internal alkynes leading to benzo[b]phosphole oxides was developed, which eliminates residual heavy metal contamination in the product.

Selective Synthesis of Tetrasubstituted Olefins by Copper-Mediated Acetoxythiolation of Internal Alkynes: Scope and Mechanistic Studies

2018 ◽  
Vol 24 (50) ◽  
pp. 13124-13135 ◽  
Author(s):  
Pedro Villuendas ◽  
Sara Ruiz ◽  
Pietro Vidossich ◽  
Agustí Lledós ◽  
Esteban P. Urriolabeitia
Keyword(s):  
Selective Synthesis ◽  
Mechanistic Studies ◽  
Internal Alkynes ◽  
Tetrasubstituted Olefins

Visible light promoted coupling of alkynyl bromides and Hantzsch esters for the synthesis of internal alkynes

2019 ◽  
Vol 17 (1) ◽  
pp. 181-185 ◽  
Author(s):  
Zhi-Yong Song ◽  
Chun-Lin Zhang ◽  
Song Ye
Keyword(s):  
Visible Light ◽  
Metal Free ◽  
Internal Alkynes

A metal-free visible light promoted synthesis of internal alkynes was developed via the C(sp3)–C(sp) coupling of alkynyl bromides and Hantzsch esters.

Metal-Free Cycloaddition of Internal Alkynes and Multifunctional Azides Under Solvent-Free Conditions

2014 ◽  
Vol 215 (17) ◽  
pp. 1603-1608 ◽  
Author(s):  
Benedict Sandmann ◽  
Bobby Happ ◽  
Jürgen Vitz ◽  
Renzo M. Paulus ◽  
Martin D. Hager ◽  
...  
Keyword(s):  
Solvent Free ◽  
Metal Free ◽  
Solvent Free Conditions ◽  
Internal Alkynes

scholarly journals Metal‐Free Regioselective Chloroazidation of Internal Alkynes

2018 ◽  
Author(s):  
Bin Huang ◽  
Raphael Liffert ◽  
Anthony Linden ◽  
Karl Gademann
Keyword(s):  
Metal Free ◽  
Internal Alkynes

Metal-free catalytic cascade to chromones: direct coupling of salicylaldehydes and activated alkynes triggered by aryloxyl radicals

RSC Advances ◽  
2015 ◽  
Vol 5 (129) ◽  
pp. 106350-106354 ◽  
Author(s):  
Ping Wang ◽  
Zhongfeng Li ◽  
Shengli Cao ◽  
Honghua Rao
Keyword(s):  
Addition Reaction ◽  
Direct Coupling ◽  
Metal Free ◽  
Internal Alkynes ◽  
One Step ◽  
Activated Alkynes

The first intermolecular addition reaction of aryloxyl radicals to CC bonds was disclosed, which can afford biologically important chromonsviaa PhNMe3I-catalyzed direct coupling of salicylaldehydes and activated internal alkynes in only one step.

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