Synthesis of Hydrazulenes via Zr-Promoted Bicyclization of Enynes and Transition Metal-Catalyzed or Radical Cyclization of Alkenyl Iodides. Efficient Synthesis of (±)-7-epi-β-Bulnesene

1997 ◽  
Vol 62 (7) ◽  
pp. 1922-1923 ◽  
Author(s):  
Ei-ichi Negishi ◽  
Shengming Ma ◽  
Takumichi Sugihara ◽  
Yumiki Noda
Keyword(s):  
Transition Metal ◽  
Radical Cyclization ◽  
Efficient Synthesis ◽  
Transition Metal Catalyzed ◽  
Metal Catalyzed

Radical Strategy for the Transition-Metal-Catalyzed Synthesis of γ-Lactones: A Review

Synthesis ◽  
2020 ◽  
Vol 52 (24) ◽  
pp. 3855-3865
Author(s):  
Ren-Jie Song ◽  
Bin Wei ◽  
Ke-Wei Li ◽  
Yan-Chen Wu ◽  
Shi-Qi Tong
Keyword(s):  
Natural Products ◽  
Transition Metal ◽  
Recent Progress ◽  
Food Additives ◽  
Radical Cyclization ◽  
Biological Molecules ◽  
Cyclization Reactions ◽  
Unsaturated Carboxylic Acids ◽  
Transition Metal Catalyzed ◽  
Metal Catalyzed

The γ-lactone skeleton is very important component of various natural products, biological molecules, food additives, and perfumes. As a result, much effort has been made towards such compounds. In this review, we summarize recent progress in transition-metal-catalyzed annulation reactions for the formation of γ-lactone derivatives through a radical pathway. Various reagents, such as anhydrides, Togni’s reagent, TMSN3, arenesulfonyl chlorides, arenediazonium salts, dibenzoyl peroxides, O-benzoylhydroxylamine, NFSI, and α-halocarboxylic compounds, used in radical cyclization reactions are described, and the mechanisms of these radical annulation reactions are also discussed.1 Introduction2 Annulations of Alkenes with Anhydrides3 Annulations of Unsaturated Carboxylic Acids with Nucleophiles4 Annulations of Alkenes with α-Halocarboxylic Compounds5 Conclusions and Outlook

Recent advances in transition-metal-catalyzed reactions of alkynes with isoxazoles

2017 ◽  
Vol 15 (40) ◽  
pp. 8483-8492 ◽  
Author(s):  
Long Li ◽  
Tong-De Tan ◽  
Ying-Qi Zhang ◽  
Xin Liu ◽  
Long-Wu Ye
Keyword(s):  
Transition Metal ◽  
Recent Progress ◽  
Efficient Synthesis ◽  
Recent Advances ◽  
Transition Metal Catalyzed ◽  
Catalyzed Reactions ◽  
Metal Catalyzed

In this review, recent progress in the transition-metal-catalyzed formal annulations of alkynes with isoxazoles for the efficient synthesis of N-heterocycles is discussed.

Sign in / Sign up

Export Citation Format

Share Document