Stereocontrolled synthesis of anticancer β-lactams via the Staudinger reaction
作者:Bimal K. Banik、Indrani Banik、Frederick F. Becker
DOI:10.1016/j.bmc.2005.03.044
日期:2005.6
Stereocontrolledsynthesis of novel beta-lactams using polyaromatic imines following the Staudinger reaction has been accomplished. The effects of domestic microwave irradiation on this type of reaction have been investigated. Formation of trans-beta-lactams has been explained through isomerization of the enolates formed during the reaction of acid chloride (equivalent) with imines in the presence
Unprecedented stereoselectivity in the Staudinger reaction with polycyclic aromatic imines
作者:Bimal K Banik、Frederick F Becker
DOI:10.1016/s0040-4039(00)01126-6
日期:2000.8
Cycloaddition of imines derived from polycyclic aromatic amines with acid chloride (or equivalent) in the presence of triethylamine at −78°C to room temperature unexpectedly produced trans-β-lactams.
Stereoselective Synthesis of β-Lactams with Polyaromatic Imines: Entry to New and Novel Anticancer Agents
作者:Indrani Banik、Frederick F. Becker、Bimal K. Banik
DOI:10.1021/jm0255825
日期:2003.1.1
We present herein stereoselectivesynthesis of novel beta-lactams using polyaromatic imines following the Staudinger reaction. Consistent mechanisms for these results have been advanced. As a measure of cytotoxicity, some of these compounds have been assayed against nine human cancer cell lines. Structure-activity study has revealed that 1-N-chrysenyl and 1-N-phenanthrenyl 3-acetoxy-4-aryl-2-azetidinones
An Efficient Synthesis of Optically Active trans-(3R,4R)-3-Acetoxy-4-aryl-1-(chrysen-6-yl)azetidin-2-ones Using (+)-Car-3-ene as a Chiral Auxiliary
作者:Aarif L. Shaikh、Orlando Esparza、Bimal K. Banik
DOI:10.1002/hlca.201100225
日期:2011.12
An efficient enantioselective synthesis of 3‐acetoxy trans‐β‐lactams 7a and 7b via [2+2] cycloaddition reactions of imines 4a and 4b, derived from a polycyclic aromatic amine and bicyclic chiral acid obtained from (+)‐car‐3‐ene, is described. The cycloaddition was found to be highly enantioselective, producing only trans‐(3R,4R)‐N‐azetidin‐2‐one in very good yields. This is the first report of the
Synthesis of anticancer β-lactams: mechanism of action
作者:Bimal K. Banik、Frederick F. Becker、Indrani Banik
DOI:10.1016/j.bmc.2004.03.033
日期:2004.5
Synthesis of the trans 1-N-chrysenyl and 1-N-phenanthrenyl 3-acetoxy-4-phenyl-2-azetidinones has been achieved. Microwave-assisted reaction has proved useful in the synthesis of these compounds. Cell growth inhibition study has indicated selective anticancer activity against two leukemia and colon carcinoma cell lines. A mechanistic correlation of their anticancer activity has been described. Striking G(2) blockade that is clearly distinct in cell cycle analysis and demonstrated only in sensitive cell lines has been observed. They, do not induce apoptosis in sensitive or resistant lines. They also do not inhibit topoisomerases. Ames test has shown they are nonmutagenic. (C) 2004 Published by Elsevier Ltd.