Diastereoselective [5+1] double Michael reactions of thiooxindole with divinyl ketones: Synthesis of meso-spiro[cyclohexanone indoline-2-thione] by intramolecular induction with sulfur
Publish place: 27th Iranian Seminar on Organic Chemistry
Publish Year: 1398
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:
ISOC27_110
تاریخ نمایه سازی: 19 اسفند 1399
Abstract:
The first diastereoselective synthesis of spiro-thiooxindole is reported via Michael reaction between thiooxindoles and divinyl ketones. The reaction was conducted without any catalyst or additive in ethanol as a green solvent at room temperature. This study showed the art of governing regioselectivity in which novel spiro frameworks were generated in high yields. In addition, simple purification process and diastereoselectivity make this protocol highly attractive. The structure of the products was investigated in the light of spectral data (IR, HRMS, 1H-NMR, 13C-NMR, NOESY, COSY, and X-ray diffraction). These compounds can be active biological substances and worthy of attention for the medicinal chemists.
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Authors
Vahid Saberi
Laboratory of Organic Synthesis and Natural Products, Department of Chemistry, Sharif University of Technology, Azadi Street, PO Box ۱۱۱۵۵۹۵۱۶, Tehran, Iran
Firouz Matloubi Moghaddam
Laboratory of Organic Synthesis and Natural Products, Department of Chemistry, Sharif University of Technology, Azadi Street, PO Box ۱۱۱۵۵۹۵۱۶, Tehran, Iran
Ashkan Karimi
Laboratory of Organic Synthesis and Natural Products, Department of Chemistry, Sharif University of Technology, Azadi Street, PO Box ۱۱۱۵۵۹۵۱۶, Tehran, Iran