Sydnones as Masked Hydrazines for the Synthesis of 4‐Arylazo‐1,2‐dihydro‐pyrazol‐3‐one Derivatives
作者:Prashant S. Shinge、Prashant R. Latthe、Bharati V. Badami
DOI:10.1080/00397910500182333
日期:2005.8.1
A simple and convenient one-pot synthesis of 4-(4-chlorophenylazo)-5-methyl-2-aryl- 1,2-dihydro-pyrazol -3-ones (4a-j) has been carried out from 3-arylsydnones (3a-j) by reaction with 2-(4-chlorophenyl)-hydrazono-3-oxo-butyric acid ethyl ester (2b). The 3-arylsydnones are used as masked hydrazines in this reaction. Similarly, the 4-arylazo-2-(7-hydroxy-4-methyl-2-oxo-2H-chromen-8-ylmethyl)-5-methy 1- 1,2-dihydro-pyrazol-3-ones (7a-j) were synthesized from 3+7-acetoxy-4-methyl-8-methylene)coumaryl]sydnone (5). All the newly synthesized compounds exhibited antimicrobial activity greater than the reference drugs used.
Heterocycles. II. Nitration of 3-arylsydnones
作者:P.M. Weintraub、R.E. Bambury
DOI:10.1016/s0040-4039(01)87753-4
日期:1969.1
Tien Hsien-Ju, Lin Shaw-Tao, Sheu Jinn-Tsair, Can. J. Chem., 72 (1994) N 7, S 1610-1613
作者:Tien Hsien-Ju, Lin Shaw-Tao, Sheu Jinn-Tsair
DOI:——
日期:——
A facile synthesis of pyrazolo[3,4-<i>D</i>]pyridazines<i>Via</i>the 1,3-dipolar cycloaddition of 3-arylsydnones. Synthesis and computational studies of 1-aryl-4,5-dihydro-1<i>H</i>-pyrazolo[3,4-<i>D</i>]pyridazine-3,6-diones and their 3,6-dichloro derivatives.
作者:R. Sanyal、Bharati V. Badami
DOI:10.1002/jhet.5570430403
日期:2006.7
The synthetic utility of 1,3-dipolarcycloaddition of DMAD to sydnones has been exploited in the preparation of new 1-aryl-4,5-dihydro-1H-pyrazolo[3,4-d]pyridazine-3,6-diones 7a-j and their aromatic 3,6-dichloro analogues 8a-j. The lactam-lactim tautomerism of compound 7a has been studied by the semi emperical (PM3) and ab initio methods.
到sydnones DMAD的1,3-偶极环加成的合成实用程序已在新的1-芳基-4,5-二氢- 1的制备被利用ħ -吡唑并[3,4- d ]哒嗪-3,6-二酮7a-j及其芳族3,6-二氯类似物8a-j。化合物7a的内酰胺-内酰胺互变异构现象已通过半皇家(PM3)和从头算的方法进行了研究。
Tien, Hsien-Ju; Lin, Shaw-Tao; Sheu, Jinn-Tsair, Canadian Journal of Chemistry, 1994, vol. 72, # 7, p. 1610 - 1613