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Title: | Construction of spiropyrans via [4+2] photocycloaddition reactions and its computational investigation |
Authors: | Singh, Saurabh Joshi, Rahul Pardasani, R T |
Keywords: | Chalones;2-Chloropropene;DFT-B3LYP/6-31-G+ (2d,2p);Heteroary ketones;Thioisatin |
Issue Date: | Aug-2020 |
Publisher: | NISCAIR-CSIR, India |
Abstract: | [4+2]-Photochemical cycloaddition provides one of the most efficient and versatile route for the exploring of carbocyclic and heterocyclic frameworks of different sizes with high atom economy. [4+2] photocycloaddition of the chalcones (2a-h) obtained by Knoevenagel condensation of thiosatin and different heteroaryl ketones viz. 2-acetyl, 3-acetyl, 4-acetylpyridines and 2-acetylthiophene olefinic 2-chloropropene with as dienophiles led to the construction of six membered novel spiropyran heterocycles (3a-h) with 60% yield. The mechanism of the [4+2] photocycloaddition reaction has been investigated in detail by DFT-B3LYP/6-31-G+ (2d, 2p) computational method. |
Page(s): | 1216-1224 |
ISSN: | 0975-0983(Online); 0376-4699(Print) |
Appears in Collections: | IJC-B Vol.59B(08) [August 2020] |
Files in This Item:
File | Description | Size | Format | |
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IJCB 59B(8) 1216-1224.pdf | 664.97 kB | Adobe PDF | View/Open |
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