A Characterization of $$^2F_4(q)$$ 2 F 4 ( q ) by the set of orders of maximal Abelian subgroups

Ionization and tautomerism of methyl fluorescein and related dyes

“…The shape of the spectral curves of the methyl ether and methyl ether-ester obtained in the present paper agrees with those published by others [32][33][34][35][36]. It should be noted, that the presence of the charged COO À group in the phthalic residue shifts the band of the xanthene moiety hypsochromically [7,22,25,27,28,37,58,64,65].…”

“…Some data on ethers and esters of fluorescein dyes are available in the literature [25][26][27][28][29][30][31][32][33][34][35][36][37]; Amat-Guerri et al studied the ethers of eosin and rose bengal B and thus estimated the fractions of the lactonic monoanions of these dyes [37].…”

A versatile fluorescence approach to kinetic studies of hydrocarbon autoxidations and their inhibition by radical-trapping antioxidants

“…Table 1 Relevant spectral parameters of coumarin-phosphine conjugates 4-7 and corresponding phosphine oxides (8)(9)(10)(11) at 298 K in MeOH premier lipid-soluble radical-trapping antioxidant), and the rate of the inhibited autoxidation could be used with the standard formulae 21 to determine k inh = 2.0 Â 10 6 M À1 s À1 , in excellent agreement with the literature value of 2.1 Â 10 6 M À1 s À1 . 2 The high oxidizability of 7-DHC suggests that it is an excellent substrate for kinetic studies of inhibited autoxidations, particularly for very effective antioxidants, 22,23 which are difficult with styrene.…”

Transition-Metal-Free Selective Halocyclization of N-Alkoxy Amides: Synthesis of N-Alkoxy Lactams and Oximinolactones

“…1 5 However, reports on the synthesis of halogenated N -alkoxy lactams and oximinolactones are limited. In 2015, Liu et al developed a CuX 2 -mediated oxybromination and aminochlorination, 5a which is limited to the synthesis of chlorolactams and bromoiminolactones using hazardous oxidant and stochiometric transition metals (Scheme 1a ). Therefore, there is an imperative to establish a simple protocol for the synthesis of these crucial building blocks, accommodating a wide range of substrates.…”

“…Starting materials amides 1-allyl- N -methoxycyclobutanecarboxamide ( 1a ), 1-allyl- N -methoxycyclohexanecarboxamide ( 1b ), N -methoxy-2,2-dimethylpent-4-enamide ( 1c ), 2-ethyl- N -methoxy-2-methylpent-4-enamide ( 1d ), 2-allyl- N -methoxy-2-methylpent-4-enamide ( 1f ), and N -methoxy-2-vinylbenzamide ( 1m ) were synthesized by using a known literature method, 18 as were N -methoxy-2,2-diphenylpent-4-enamide ( 1e ), 1-allyl- N -ethoxycyclohexanecarboxamide ( 1h ), 19 N -methoxypent-4-enamide ( 1g ), 5i N -ethoxypent-4-enamide ( 1u ), 20 N -(benzyloxy)pent-4-enamide ( 1v ), 5a N -methoxy-2,2-diphenylhex-5-enamide ( 1w ), 21 ( E )- N -methoxy-2,2-diphenylhex-4-enamide ( 1q ), 22 N ,5-dimethoxy-2-vinylbenzamide ( 1y ), 5b N -methoxy-2-phenylpent-4-enamide ( 1z ). 5b Starting material for the synthesis of 2g N -methoxy-2-methyl-pent-4-enamide ( 1n ) 5i .…”