Guaiazulene, 1,4-dimethyl-7-isopropylazulene, is one of the non-benzenoid aromatic compounds consisting of fused of the seven- and the five-membered ring. Guaiazulene is an important natural product and having great potential due to its unique optical and electronic properties. In this study, a method for propargyl insertion into the C-4 methyl group of the guaiazulene is developed. A one-pot reaction of the guaiazulene, LDA, and propargyl bromide in THF affords the corresponding a new propargyl-azulene hybrid derivative. Additionally, Diels-Alder cycloaddition reaction between the propargyl-GA and tetraphenylcyclopentadienone was performed, and the cycloadduct was obtained with excellent yield. The structures of new compounds were elucidated on the basis of extensive spectroscopic (IR, NMR, and UV-vis) data analysis. This approach may be potentially useful for the development of the new azulene derivatives.
Azulene Guaiazulene Propargylation Alkynylation Diels-Alder cycloaddition
The author is indebted to Atatürk University for its financial support and thanks to Professor Arif Daştan for helpful discussions.
Guaiazulene, 1,4-dimethyl-7-isopropylazulene, is one of the non-benzenoid aromatic compounds consisting of fused of the seven- and the five-membered ring. Guaiazulene is an important natural product and having great potential due to its unique optical and electronic properties. In this study, a method for propargyl insertion into the C-4 methyl group of the guaiazulene is developed. A one-pot reaction of the guaiazulene, LDA, and propargyl bromide in THF affords the corresponding a new propargyl-azulene hybrid derivative. Additionally, Diels-Alder cycloaddition reaction between the propargyl-GA and tetraphenylcyclopentadienone was performed, and the cycloadduct was obtained with excellent yield. The structures of new compounds were elucidated on the basis of extensive spectroscopic (IR, NMR, and UV-vis) data analysis. This approach may be potentially useful for the development of the new azulene derivatives.
Azulene guaiazulene propargylation alkynylation one-pot synthesis Diels-Alder cycloaddition
Birincil Dil | İngilizce |
---|---|
Konular | Kimya Mühendisliği |
Bölüm | Kimya / Chemistry |
Yazarlar | |
Yayımlanma Tarihi | 15 Aralık 2020 |
Gönderilme Tarihi | 11 Mayıs 2020 |
Kabul Tarihi | 25 Haziran 2020 |
Yayımlandığı Sayı | Yıl 2020 |