Chemistry, 2023 We hereby report a simple and efficient method for the preparation of 4-methylcoumarins series, including Coumarin 120 (7-amino-4-methylcoumarin) from phenols (or naphthols) and ethyl acetoacetate in the presence of 3 mol% InCl3.
Silvia J. Becerra-Anaya +2 more
doaj +1 more source
Urinary naphthalene and phenanthrene as biomarkers of occupational exposure to polycyclic aromatic hydrocarbons. [PDF]
, 2008 OBJECTIVES: The study investigated the utility of unmetabolised naphthalene (Nap) and phenanthrene (Phe) in urine as surrogates for exposures to mixtures of polycyclic aromatic hydrocarbons (PAHs).
Garshick, E +9 more
core +3 more sources
Visible-light promoted atom transfer radical addition-elimination (ATRE) reaction for the synthesis of fluoroalkylated alkenes using DMA as electron-donor [PDF]
, 2020 Here, we describe a mild, catalyst-free and operationally-simple strategy for the direct fluoroalkylation of olefins driven by the photochemical activity of an electron donor-acceptor (EDA) complex between DMA and fluoroalkyl iodides.
Gu, Jiwei +5 more
core +2 more sources
Frontiers in Chemistry, 2021 A Brønsted acid-catalyzed domino ring-opening cyclization transformation of donor-acceptor (D-A) cyclopropanes and 2-naphthols has been developed.
Hua Zhao +4 more
doaj +1 more source
Urinary 1-Hydroxypyrene Levels in Workers Exposed to Polycyclic Aromatic Hydrocarbon from Rubber Wood Burning [PDF]
, 2014 BackgroundUrinary 1-hydroxypyrene (1-OHP) was selected as a biomarker of polycyclic aromatic hydrocarbons (PAHs) to explore the accumulation level in the bodies of workers at rubber smoke sheet factories in southern Thailand.MethodsSpot urine samples ...
Berkhout, J J +5 more
core +4 more sources
Total Syntheses of HMP-Y1, Hibarimicinone, and HMP-P1 [PDF]
, 2012 Total syntheses of HMP-Y1, atrop-HMP-Y1, hibarimicinone, atrop-hibarimicinone, and HMP-P1 are described using a two-directional synthesis strategy. A novel benzyl fluoride Michael–Claisen reaction sequence was developed to construct the complete carbon ...
Liau, Brian Bor-Jen +2 more
core +1 more source
Three-component domino reaction in Triton B: A facile synthesis of 4H-chromene derivatives
Results in Chemistry, 2023 Herein, we report an unprecedented one-pot domino synthesis of indole- or naphthol-tethered biologically relevant 4H-chromene derivatives from readily accessible salicylaldehydes, malononitrile, and indoles/β-naphthols employing efficient, inexpensive ...
Mrinal Talukdar +2 more
doaj +1 more source
Asymmetric synthesis of gonytolide A: strategic use of an aryl halide blocking group for oxidative coupling [PDF]
, 2018 The first synthesis of the chromanone lactone dimer gonytolide A has been achieved employing vanadium(V)-mediated oxidative coupling of the monomer gonytolide C. An o-bromine blocking group strategy was employed to favor para- para coupling and to enable
Iwata, Takayuki +5 more
core +1 more source
Surface photochemistry of the herbicide napropamide. The role of the media and environmental factors in directing the fates of intermediates [PDF]
, 2008 The photochemical behaviour of the herbicide napropamide is studied on cellulose and silica surfaces, using steady-state and laser-flash diffuse ectance techniques.
Aguer +35 more
core +1 more source
Advanced Functional Materials, EarlyView.Alumina growth narrows surface pores and seals non‐selective defects, enhancing selectivity while preserving the nanoporous graphene architecture. Additionally, the deposition enables gradient‐controlled structural modification, with intergrown alumina acting as a physical cross‐linker that stabilizes the laminar structure.
Junhyeok Kang +8 more
wiley +1 more source