Metal-Free Direct Construction of 2-(Oxazol-5-yl)phenols from N-Phenoxyamides and Alkynylbenziodoxolones via Sequential [3,3]-Rearrangement/Cyclization

2018 ◽  
Vol 20 (23) ◽  
pp. 7694-7698 ◽  
Author(s):  
Ming Li ◽  
Jia-Hui Wang ◽  
Wei Li ◽  
Li-Rong Wen
Keyword(s):  
Direct Construction ◽  
Metal Free

Metal-free direct construction of sulfenylated pyrazoles via the NaOH promoted sulfenylation of pyrazolones with aryl thiols

RSC Advances ◽  
2016 ◽  
Vol 6 (57) ◽  
pp. 51830-51833 ◽  
Author(s):  
Xiaoxia Liu ◽  
Huanhuan Cui ◽  
Daoshan Yang ◽  
Shicui Dai ◽  
Tiantian Zhang ◽  
...  
Keyword(s):  
Cost Effective ◽  
Direct Construction ◽  
Metal Free

A convenient and cost-effective NaOH-promoted direct sulfenylation of pyrazolones with aryl thiols has been developed under mild and metal-free conditions.

Direct construction of 2,3-unsubstituted benzofurans and benzothiophenes via a metal-free catalyzed intramolecular Friedel–Crafts reaction

2019 ◽  
Vol 6 (4) ◽  
pp. 493-497
Author(s):  
Weimin Ma ◽  
Jiawei Huang ◽  
Xianyu Huang ◽  
Shulin Meng ◽  
Zhengwei Yang ◽  
...  
Keyword(s):  
Direct Construction ◽  
Metal Free ◽  
Straightforward Method ◽  
Highly Effective

A highly effective and straightforward method for the construction of 2,3-unsubstituted benzofurans and benzothiophenes has been developed.

ChemInform Abstract: Metal-Free Direct Construction of Sulfonamides via Iodine-Mediated Coupling Reaction of Sodium Sulfinates and Amines at Room Temperature.

ChemInform ◽  
2015 ◽  
Vol 46 (30) ◽  
pp. no-no
Author(s):  
Wei Wei ◽  
ChunLi Liu ◽  
Daoshan Yang ◽  
Jiangwei Wen ◽  
Jinmao You ◽  
...  
Keyword(s):  
Room Temperature ◽  
Coupling Reaction ◽  
Direct Construction ◽  
Metal Free

Transition-metal-free catalyzed [3+2] cycloadditions/oxidative aromatization reactions for the synthesis of annulated indolizines

2019 ◽  
Vol 43 (43) ◽  
pp. 17000-17003 ◽  
Author(s):  
Qianwei Zhang ◽  
Bin Wang ◽  
Huifang Ma ◽  
Keyume Ablajan
Keyword(s):  
Transition Metal ◽  
Direct Construction ◽  
Metal Free ◽  
Oxidative Aromatization

A transition-metal-free catalyzed [3+2] cycloadditions/oxidative aromatization three-component reactions for direct construction of annulated indolizines was reported.

ChemInform Abstract: Metal-Free Direct Construction of Sulfenylated Pyrazoles via the NaOH Promoted Sulfenylation of Pyrazolones with Aryl Thiols.

ChemInform ◽  
2016 ◽  
Vol 47 (41) ◽  
Author(s):  
Xiaoxia Liu ◽  
Huanhuan Cui ◽  
Daoshan Yang ◽  
Shicui Dai ◽  
Tiantian Zhang ◽  
...  
Keyword(s):  
Direct Construction ◽  
Metal Free

Metal-Free Direct Construction of SulfonamidesviaIodine- Mediated Coupling Reaction of Sodium Sulfinates and Amines at Room Temperature

2015 ◽  
Vol 357 (5) ◽  
pp. 987-992 ◽  
Author(s):  
Wei Wei ◽  
ChunLi Liu ◽  
Daoshan Yang ◽  
Jiangwei Wen ◽  
Jinmao You ◽  
...  
Keyword(s):  
Room Temperature ◽  
Coupling Reaction ◽  
Direct Construction ◽  
Metal Free

Transition-Metal-Free Aerobic Oxidative Cross-Coupling of Indoles with Arylidenemalononitriles

Synlett ◽  
2019 ◽  
Vol 31 (02) ◽  
pp. 194-198
Author(s):  
Aizhen Yang ◽  
Zheng Li
Keyword(s):  
Transition Metal ◽  
Efficient Method ◽  
Cross Coupling ◽  
Transition Metal Catalysts ◽  
High Yield ◽  
Atom Economy ◽  
Direct Construction ◽  
Organometallic Reagents ◽  
Metal Free ◽  
Mild Conditions

An efficient method for the direct construction of C(sp2)–C(sp2) bonds by aerobic oxidative cross-coupling of indoles with arylidenemalononitriles is described. Various [aryl(1H-indol-3-yl)methylene]malononitriles were efficiently synthesized by using air as an oxidant under mild conditions. The salient features for this protocol are no transition-metal catalysts, no organometallic reagents, high atom economy, high yield, mild conditions, and simple workup procedures.

Metal-free I2O5-mediated direct construction of sulfonamides from thiols and amines

2017 ◽  
Vol 15 (22) ◽  
pp. 4789-4793 ◽  
Author(s):  
Minghui Zhu ◽  
Wei Wei ◽  
Daoshan Yang ◽  
Huanhuan Cui ◽  
Leilei Wang ◽  
...  
Keyword(s):  
One Pot ◽  
Direct Construction ◽  
Metal Free

A simple and efficient metal-free I2O5-mediated one-pot procedure for the construction of sulfonamides from thiols and amines has been developed.

Base-Catalyzed Tandem Cyclization: Diastereoselective Access to the 3,4-Dihydroisoquinolin-2(1H)-one Core

Synthesis ◽  
2018 ◽  
Vol 51 (06) ◽  
pp. 1473-1481 ◽  
Author(s):  
Harshadas Meshram ◽  
Ravindra Kumbhare ◽  
Prashishkumar Shirsat ◽  
Navnath Khomane ◽  
Sneha Meshram ◽  
...  
Keyword(s):  
Natural Products ◽  
Transition Metal ◽  
Acetylenic Esters ◽  
One Pot ◽  
Direct Construction ◽  
Metal Free ◽  
Diastereoselective Reaction ◽  
Three Component Reaction ◽  
Tandem Cyclization

A novel, one-pot reaction for the synthesis of 3,4-dihydroisoquinolin-2(1H)-one derivatives is developed via a base-mediated three-component reaction of ninhydrin, aniline and acetylenic esters. This diastereoselective reaction takes place in methanol at 70 °C under transition-metal-free conditions, and direct construction of the C–N and C–C bonds is readily achieved via tandem cyclization. These cyclic frameworks are resourceful small molecular keys to many natural products.

Direct construction of benzimidazo[l,2-c]quinazolin-6-ones via metal-free oxidative C–C bond cleavage

2018 ◽  
Vol 5 (23) ◽  
pp. 3464-3468 ◽  
Author(s):  
Ping-Gui Li ◽  
Cheng Yan ◽  
Shuai Zhu ◽  
Shu-Hui Liu ◽  
Liang-Hua Zou
Keyword(s):  
Bond Cleavage ◽  
Bond Formation ◽  
Direct Construction ◽  
Metal Free

A highly regioselective protocol has been developed for the synthesis of benzimidazo[l,2-c]quinazolin-6-ones via C–C bond cleavage and triple C–N bond formation.

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