Efficient Synthesis of Five Types of Heterocyclic Compounds via Intramolecular Elimination Using Ultrasound-Static Heating Technique

2018 ◽  
Vol 13 (16) ◽  
pp. 2009-2013 ◽  
Author(s):  
Hongfei Jiang ◽  
Xueyang Dong ◽  
Xin Jin ◽  
Danyang Zhu ◽  
Ruijuan Yin ◽  
...  
Keyword(s):  
Heterocyclic Compounds ◽  
Efficient Synthesis ◽  
Static Heating

Hetero Diels–Alder reactions of o-thioquinones with cyclic dienes: an efficient synthesis of novel heterocyclic compounds

Tetrahedron ◽  
2001 ◽  
Vol 57 (39) ◽  
pp. 8349-8356 ◽  
Author(s):  
Vijay Nair ◽  
Bini Mathew ◽  
Nigam P Rath ◽  
M Vairamani ◽  
S Prabhakar
Keyword(s):  
Heterocyclic Compounds ◽  
Diels Alder ◽  
Efficient Synthesis ◽  
Cyclic Dienes

Recent Advances on Synthesis of 1,4-Benzoxazines and its Derivatives

2021 ◽  
Vol 25 ◽  
Author(s):  
Wei Liang ◽  
Li-Jing Min ◽  
Liang Han ◽  
Xing-Hai Liu
Keyword(s):  
Reaction Mechanisms ◽  
Heterocyclic Compounds ◽  
Synthesis Methods ◽  
Important Class ◽  
Efficient Synthesis ◽  
Reaction Conditions ◽  
Active Structure ◽  
Recent Advances ◽  
The Future

: 1,4-benzoxazine compounds are an important class of heterocyclic compounds. Ever since 1,4-benzoxazine was discovered in 1959, it has attracted chemists due to its unique physiological activities, and their synthesis and application have been studied. However, the traditional synthesis methods of 1,4-benzoxazines have some drawbacks, such as complicated steps, harsh reaction conditions and low yield. Therefore, it is still a significant direction to develop new and efficient synthesis methods. In this paper, the synthesis methods and reaction mechanisms of these compounds are reviewed, and the application prospect of 1,4- benzoxazine and its derivatives as a dominant active structure in the future is discussed.

Phosphine-catalyzed [3 + 2] cycloaddition of phthalazinium dicyanomethanides with allenoates: highly efficient synthesis of 1,2,3,10b-tetrahydropyrrolo[2,1-a]phthalazine derivatives

RSC Advances ◽  
2016 ◽  
Vol 6 (81) ◽  
pp. 77931-77936 ◽  
Author(s):  
Chunhao Yuan ◽  
Leijie Zhou ◽  
Zhanhu Sun ◽  
Hongchao Guo
Keyword(s):  
Heterocyclic Compounds ◽  
Room Temperature ◽  
Efficient Synthesis ◽  
Highly Efficient

The phosphine-catalyzed [3 + 2] cycloaddition has been achieved at room temperature, providing novel heterocyclic compounds, 1,2,3,10b-tetrahydropyrrolo[2,1-a]phthalazine derivatives, as single (Z)-isomers in excellent yields (88–99% yield).

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