Synthesis of some new N-(alkyl/aralkyl)-N-(2,3-dihydro-1,4-benzodioxan-6-yl)-4-chlorobenzenesulfonamides as possible therapeutic agents for Alzheimer's disease and Type-2 Diabetes

Pak J Pharm Sci. 2019 Jan;32(1):61-68.

Abstract

In the current research work, a series of new N-(alkyl/aralkyl)-N-(2,3-dihydro-1,4-benzodioxan-6-yl)-4-chlorobenzenesulfonamides has been synthesized by reacting 1,4-benzozzdioxan-6-amine (1) with 4-chlorobenzenesulfonyl chloride (2) to yield N-(2,3-dihydro-1,4-benzodioxan-6-yl)-4-chlorobenzenesulfonamide (3) which was further reacted with different alkyl/aralkyl halides (4a-n) to afford the target compounds (5a-n). Structures of the synthesized compounds were confirmed by IR, 1H-NMR, EI-MS spectral techniques and CHN analysis data. The results of enzyme inhibition showed that the molecules, N-2-phenethyl-N-(2,3-dihydro-1,4-benzodioxin-6-yl)-4-chlorobenzenesulfonamide (5j) and N-(1-butyl)-N-(2,3-dihydro-1,4-benzodioxin-6-yl)-4-chlorobenzenesulfonamide (5d), exhibited moderate inhibitory potential against acetylcholinesterase with IC50 values 26.25±0.11 μM and 58.13±0.15 μM respectively, whereas, compounds N-benzyl-N-(2,3-dihydro-1,4-benzodioxin-6-yl)-4-chlorobenzenesulfonamide (5i) and N-(pentane-2-yl)-N-(2,3-dihydro-1,4-benzodioxin-6-yl)-4-chlorobenzenesulfonamide (5f) showed moderate inhibition against α-glucosidase enzyme as evident from IC50 values 74.52±0.07 and 83.52±0.08 μM respectively, relative to standards Eserine having IC50 value of 0.04±0.0001 μM for cholinesterases and Acarbose having IC50 value 38.25±0.12 μM for α-glucosidase, respectively.

MeSH terms

  • Acetylcholinesterase / metabolism
  • Alzheimer Disease / drug therapy*
  • Alzheimer Disease / enzymology
  • Butyrylcholinesterase / metabolism
  • Cholinesterase Inhibitors / chemical synthesis*
  • Cholinesterase Inhibitors / pharmacology*
  • Diabetes Mellitus, Type 2 / drug therapy*
  • Diabetes Mellitus, Type 2 / enzymology
  • Glycoside Hydrolase Inhibitors / chemical synthesis*
  • Glycoside Hydrolase Inhibitors / pharmacology*
  • Mass Spectrometry
  • Molecular Structure
  • Proton Magnetic Resonance Spectroscopy
  • Structure-Activity Relationship
  • Sulfonamides / chemical synthesis*
  • Sulfonamides / pharmacology*
  • alpha-Glucosidases / metabolism

Substances

  • Cholinesterase Inhibitors
  • Glycoside Hydrolase Inhibitors
  • Sulfonamides
  • Acetylcholinesterase
  • Butyrylcholinesterase
  • alpha-Glucosidases