A facile construction of oxygen heterocycles by the reaction of benzoxepine-4-carboxylates with dihaloalkanes and activated alkynes

2019 ◽  
Vol 17 (27) ◽  
pp. 6645-6653 ◽  
Author(s):  
Veera Prasad Kasagani ◽  
Siva Hariprasad Kurma ◽  
China Raju Bhimapaka
Keyword(s):  
Oxygen Heterocycles ◽  
Activated Alkynes

The manuscript describes the preparation of naphtho[1,3]-dioxoles, [1,4]-dioxines, [1,4]-dioxepines, [1,4]-dioxocines and diethyl 2-(2-ethoxy-2-oxoethyl)naphtho[1,3]dioxoles by the reaction of benzoxepine-4-carboxylates with dihaloalkanes and activated alkynes.

Phosphine-Catalyzed Regioselective Heteroaromatization Between Activated Alkynes and Isocyanides Leading to Pyrroles.

ChemInform ◽  
2005 ◽  
Vol 36 (32) ◽  
Author(s):  
Shin Kamijo ◽  
Chikashi Kanazawa ◽  
Yoshinori Yamamoto
Keyword(s):  
Activated Alkynes

scholarly journals Gold-Catalyzed Nitrene Transfer to Activated Alkynes: Formation of α,β-Unsaturated Amidines

2011 ◽  
Vol 13 (7) ◽  
pp. 1738-1741 ◽  
Author(s):  
Chaoqun Li ◽  
Liming Zhang
Keyword(s):  
Nitrene Transfer ◽  
Activated Alkynes

Transformation of 2-methyl-1-phenylethynyl-1,2,3,4-tetrahydroisoquinoline by the action of activated alkynes

2018 ◽  
Vol 54 (5) ◽  
pp. 576-580 ◽  
Author(s):  
Leonid G. Voskressensky ◽  
Reza Samavati ◽  
Alexander А. Titov ◽  
Elena V. Alexandrova ◽  
Natalia Yu. Chernikova ◽  
...  
Keyword(s):  
Activated Alkynes

Unexpected ring opening of pyrazolines with activated alkynes: Synthesis of 1H-pyrazole-4,5-dicarboxylates and chromenopyrazolecarboxylates

2021 ◽  
Author(s):  
Sai Teja Kolla ◽  
Nageswara Rao Rayala ◽  
Sridhar Balasubramanian ◽  
China Raju Bhimapaka
Keyword(s):  
Ring Opening ◽  
Activated Alkynes

1H-Pyrazole-4,5-dicarboxylates and chromenopyrazole carboxylates were prepared by reacting pyrazolines with activated alkynes under neat conditions without catalyst. The products were formed via unexpected ring opening of pyrazolines with the elimination...

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