Chinese Journal of Organic Chemistry >
Synthesis of Novel Spiro[pyrazole-pyrrolizin] Derivatives via 1,3-Dipolar Cycloaddition of Nitrilimine
Received date: 2012-12-06
Revised date: 2013-01-25
Online published: 2013-02-05
Supported by
Project supported by the National Natural Science Foundation of China (Nos. 20971041, 21172066).
The 1,3-dipolar cycloaddition of nitrilimine generated in situ from N'-phenylbenzohydrazonoyl chloride and triethylamine to 2-arylmethylidene-2,3-dihydro-1H-pyrrolizin-1-ones afforded novel 4-aryl-2,5-diphenyl-2,4-dihydrospiro-[pyrazole-3,2'-pyrrolizin]-1'(3'H)-ones in moderate yields. The structures of all products were characterized thoroughly by NMR, IR, mass spectra and elemental analysis.
Key words: spiroheterocycle; 1,3-dipolar cycloaddition; nitrilimine; pyrazole
Hu Xiaolian , Liu Bin , Liu Haochong , Li Xiaofang . Synthesis of Novel Spiro[pyrazole-pyrrolizin] Derivatives via 1,3-Dipolar Cycloaddition of Nitrilimine[J]. Chinese Journal of Organic Chemistry, 2013 , 33(07) : 1583 -1586 . DOI: 10.6023/cjoc201212007
/
〈 |
|
〉 |