Transition-Metal-Free Synthesis of Substituted Pyridines via Ring Expansion of 2-Allyl-2H-azirines

2014 ◽  
Vol 16 (13) ◽  
pp. 3432-3435 ◽  
Author(s):  
Yaojia Jiang ◽  
Cheol-Min Park ◽  
Teck-Peng Loh
Keyword(s):  
Transition Metal ◽  
Ring Expansion ◽  
Metal Free ◽  
Substituted Pyridines

scholarly journals Synthesis of Trifluoromethylated Cycloheptatrienes from N-Tosylhydrazones: Transition-Metal-Free Büchner Ring Expansion

Synlett ◽  
2014 ◽  
Vol 26 (01) ◽  
pp. 59-62 ◽  
Author(s):  
Xi Wang ◽  
Jianbo Wang ◽  
Zhikun Zhang ◽  
Jiajie Feng ◽  
Yan Xu ◽  
...  
Keyword(s):  
Transition Metal ◽  
Ring Expansion ◽  
Metal Free

Transition metal-free generation of the acceptor/acceptor-carbene via α-elimination: synthesis of fluoroacetyl cyclopropanes

2016 ◽  
Vol 52 (41) ◽  
pp. 6817-6820 ◽  
Author(s):  
Yongdong Wang ◽  
Jing Han ◽  
Jie Chen ◽  
Weiguo Cao
Keyword(s):  
Transition Metal ◽  
Ring Expansion ◽  
Metal Free ◽  
Free Generation

An efficient transition metal-free approach for the generation of acceptor/acceptor-carbene followed by trapping with alkenes to provide fluoroacetyl cyclopropanes has been described. The resulting cyclopropanes could be further converted into the fluoromethyl dihydrofurans or fluorodihydropyrroles through ring-expansion processes.

Transition-Metal-Free Access to Heteroaromatic-Fused 4-Tetralones by the Oxidative Ring Expansion of the Cyclobutanol Moiety

2019 ◽  
Vol 84 (15) ◽  
pp. 9611-9626 ◽  
Author(s):  
Philipp Natho ◽  
Lewis A. T. Allen ◽  
Andrew J. P. White ◽  
Philip J. Parsons
Keyword(s):  
Transition Metal ◽  
Ring Expansion ◽  
Free Access ◽  
Metal Free ◽  
Oxidative Ring Expansion

Regioselective Transition-Metal-Free Oxidative Cyclobutanol Ring Expansion to 4-Tetralones

2018 ◽  
Vol 20 (24) ◽  
pp. 8030-8034 ◽  
Author(s):  
Philipp Natho ◽  
Mia Kapun ◽  
Lewis A. T. Allen ◽  
Philip J. Parsons
Keyword(s):  
Transition Metal ◽  
Ring Expansion ◽  
Metal Free

ChemInform Abstract: Synthesis of Trifluoromethylated Cycloheptatrienes from N-Tosylhydrazones: Transition-Metal-Free Buechner Ring Expansion.

ChemInform ◽  
2015 ◽  
Vol 46 (22) ◽  
pp. no-no
Author(s):  
Zhikun Zhang ◽  
Jiajie Feng ◽  
Yan Xu ◽  
Songnan Zhang ◽  
Yuxuan Ye ◽  
...  
Keyword(s):  
Transition Metal ◽  
Ring Expansion ◽  
Metal Free

Transition-metal-free decarboxylative halogenation of 2-picolinic acids with dihalomethane under oxygen conditions

2019 ◽  
Vol 21 (20) ◽  
pp. 5565-5570 ◽  
Author(s):  
Xitao Zhang ◽  
Xiujuan Feng ◽  
Haixia Zhang ◽  
Yoshinori Yamamoto ◽  
Ming Bao
Keyword(s):  
Transition Metal ◽  
Metal Free ◽  
Oxygen Conditions ◽  
Substituted Pyridines ◽  
Picolinic Acids

The reaction of 2-picolinic acids with dihalomethane proceeded smoothly via N-chlorocarbene intermediates to afford 2-halogen-substituted pyridines in satisfactory to excellent yields under oxygen conditions.

Transition-Metal-Free Ring Expansion Reactions of Indene-1,3-dione: Synthesis of Functionalized Benzoannulated Seven-Membered Ring Compounds

2018 ◽  
Vol 20 (7) ◽  
pp. 1744-1747 ◽  
Author(s):  
Qiyi Yao ◽  
Lingkai Kong ◽  
Mengdan Wang ◽  
Yang Yuan ◽  
Ruizhuo Sun ◽  
...  
Keyword(s):  
Transition Metal ◽  
Ring Expansion ◽  
Membered Ring ◽  
Free Ring ◽  
Metal Free ◽  
Ring Compounds

Transition-metal-free catalytic hydroboration reduction of amides to amines

2020 ◽  
Vol 7 (21) ◽  
pp. 3515-3520
Author(s):  
Wubing Yao ◽  
Jiali Wang ◽  
Aiguo Zhong ◽  
Shiliang Wang ◽  
Yinlin Shao
Keyword(s):  
Transition Metal ◽  
Selective Catalytic Reduction ◽  
Catalytic Reduction ◽  
Value Added ◽  
Metal Free

The selective catalytic reduction of amides to value-added amine products is a desirable but challenging transformation.

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