A CONVENIENT SYNTHESIS OF 1,3-DISUBSTITUTED-4-(1′,3′-DITHIOLANE/DITHIANE-2′-YLIDENE)-2-PYRAZOLIN-5-ONES
作者:V. K. Ahluwalia、Suman Dudeja
DOI:10.1081/scc-100105894
日期:2001.1
1,3-Disubstituted-4-(1 ' ,3 ' -dithiolane/dithiane-2 ' -ylidene)-2-pyrazolin-5-one derivatives like (1a-c), (2a-c), (3a-c) have been obtained by condensation of 2-pyrazolin-5-ones (1), (2) and (3) with carbon disulfide in presence of triethylamine followed by the reaction with 1,2-dibromoethane (4a), 1,3-dibromopropane (4b) and 1,3-dibromobutane (4c) respectively.