Synthesis of N-(1-methyl-1H-indol-3-yl)methyleneamines and 3,3-diaryl-4-(1-methyl-1H-indol-3-yl)azetidin-2-ones as potential antileishmanial agents
作者:Girija S. Singh、Yasser M.S.A. Al-kahraman、Disah Mpadi、Masoom Yasinzai
DOI:10.1016/j.bmcl.2012.06.081
日期:2012.9
A series of N-(1-methyl-1H-indol-3-yl)methyleneamines and eight new 3,3-diaryl-4-(1-methyl-1H-indol-3-yl)azetidin-2-ones have been synthesized and screened for their antileishmanial activity against Leishmania major. 3,3-Diaryl-4-(1-methyl-1H-indol-3-yl)azetidin-2-ones have been synthesized by the Staudinger's ketene-imine cycloaddition employing two 2-diazo-1,2-diarylethanones as the precursors of diarylketenes. A marked improvement in anti-parasitic activity is observed by transformation of the methyleneamines to azetidin-2-ones in seven out of eight compounds. Two compounds displayed antileishmanial activity comparable to that of the clinically used antileshmanial drug, amphotericine B. (C) 2012 Elsevier Ltd. All rights reserved.
Antimicrobial, Crown Gall Tumor Inhibitory and Cytotoxicity Assays of N-[(1-methyl-1H-indole-3-yl)methylene]amines Synthesized by an Improved Protocol
alkyl and aromatic amines in ethanol without using any catalyst or dehydrating agent. The compounds have been screened for their antibacterial, antifungal, crown gall tumor inhibitory, and cytotoxic activities. As a major finding some of the compounds exhibited potential biological activity. The imine containing a 4-chlorophenyl group exhibits potential antitumor activity and brine shrimp lethality against
A Remarkable Titanium-Catalyzed Asymmetric Strecker Reaction using Hydrogen Cyanide at Room Temperature
作者:Balamurugan Ramalingam、Abdul Majeed Seayad、Li Chuanzhao、Marc Garland、Kazuhiko Yoshinaga、Manabu Wadamoto、Takushi Nagata、Christina L. L. Chai
DOI:10.1002/adsc.201000462
日期:2010.9.10
Close to perfect enantioselectivity (up to 98% ee) is obtained for the formation of amino nitriles using hydrogen cyanide (HCN) as the cyanide source at room temperature for the first time. In an operationally simple process, the catalyst generated from a partially hydrolyzed titanium alkoxide (PHTA) and (S)‐N‐salicyl‐β‐amino alcohol ligand, catalyzes the cyanation of imines in a short reaction time