Design, docking studies and molecular iodine catalyzed synthesis of benzo[a]xanthen-one derivatives as hyaluronidase inhibitors
作者:Mahadev N. Kumbar、Ravindra R. Kamble、Atulkumar A. Kamble、Shrinivas D. Joshi、Sheshagiri R. Dixit、Joy Hoskeri
DOI:10.1007/s00044-016-1655-2
日期:2016.11
A series of novel benzo[a]xanthen-11(12H)-one derivatives 4a–m were designed and subjected to docking studies. The title compounds were synthesized from 3-aryl-4-formylsydnones 1a–m, β-naphthol and dimedone in presence of molecular iodine as a catalyst and evaluated for their in vitro inhibitory effects on the hyaluronidase.
设计了一系列新颖的苯并[ a ]黄体酮11(12 H)-一衍生物4a - m并进行了对接研究。由3-芳基-4-甲酰基sydnones 1a – m,β-萘酚和二甲酮在分子碘作为催化剂的条件下合成标题化合物,并对其在体外对透明质酸酶的抑制作用进行了评估。
Catalytic Activity of 1,3-Dibromo-5,5-dimethylhydantoin (DBH) in the One-Pot Transformation of<i>N</i>-Arylglycines to<i>N</i>-Arylsydnones in the Presence of NaNO<sub>2</sub>/Ac<sub>2</sub>O under Neutral Conditions: Subsequent Bromination of these Sydnones to their 4-Bromo Derivatives
作者:Davood Azarifar、Hassan Ghasemnejad-Bosra
DOI:10.1055/s-2006-926380
日期:——
1,3-Dibromo-5,5-dimethylhydantoin (DBH) has been found to efficiently catalyze the one-pot conversion of various N-arylglycines through N-nitrosation and cyclization to sydnones in combination with NaNO2 and Ac2O in high yields (80-94%) under mild and neutral conditions. Also, it was shown that DBH can conveniently promote the bromination of these sydnones to their 4-bromo substituted congeners in excellent yields in DMF at room temperature.
Transformation of the sydnone ring into oxadiazolinones. A convenient one-pot synthesis of 3-aryl-5-methyl-1,3,4-oxadiazolin-2-ones from 3-arylsydnones and their antimicrobial activity
作者:Shanta G Mallur、Bharati V Badami
DOI:10.1016/s0014-827x(99)00103-2
日期:2000.1
4-oxadiazolin-2-ones (IIIa-u) by a single-step reaction with bromine in acetic anhydride. In the preliminary screening of all these compounds, the halogen-substituted derivatives have shown antimicrobialactivities equal to those of the standard drugs used.
One-Pot Conversion of N-Arylglycines to Sydnones Efficiently Promoted by Bis-chlorine-1,4-diazabicyclo[2.2.2]octane Complex (Cl2-DABCO) in the Presence of NaNO2/Ac2O under Neutral Conditions
Bis-chlorine-1,4-diazabicyclo[2.2.2]octane complex, (Cl 2 -DABCO), has been found as an active chlorine complex for effective one-potconversion of various N-arylglycines to sydnones in high yields (85-95%) under mild and neutral condition.