Brønsted acidic ionic liquid triethylamine-bonded sulfonic acid {[Et3N-SO3H]Cl} efficiently catalyzes the one-pot multi-component condensation of 2-naphthol with arylaldehydes and dimedone (5,5-dimethylcyclohexane-1,3-dione) under solvent-free conditions to afford 12-aryl-8,9,10,12-tetrahydrobenzo[a]xanthen-11-ones in high yields and relatively short reaction times.

In situ cryocrystallization has been employed to grow single crystals of 4-methoxybenzaldehyde (anisaldehyde), C(8)H(8)O(2), 2-hydroxybenzaldehyde (salicylaldehyde), C(7)H(6)O(2), and (2E)-3-phenylprop-2-enal (cinnamaldehyde), C(9)H(8)O, all of which are liquids at room temperature. Several weak C-H···O interactions of the types C(aryl)-H···O, C(formyl)-H···O and Csp(3)-H···O are present in the...

We present predictions of a relatively simple model of the low-lying 0+ states in 12Be, their predicted energy splitting in 12O, their cross-section ratios in 10Be(t,p) and 14C(p, t) and their decay widths. Comparison is made with predictions using earlier wave functions of Barker. Disciplines Physical Sciences and Mathematics | Physics Comments Suggested Citation: Fortune, H.T. and Sherr, R. (...

rearrangement were elucidated and we assumed that a total synthesis of 1would be a straightforwardmatter. As described below, we were indeed able to accomplish the inaugural total synthesis of phalarine using the rearrangement strategy, although significant obstacles had to be overcome. For a total synthesis of phalarine, it would be best if the rearrangement could be conducted on an advanced-s...

Reactions of the aryl complexes Rh(aryl){? 3 -P,O,P-[xant(P i Pr 2 ) ]} (1; = 3,5-Me C 6 H (a), 5 (b), 3,5-Cl (c), 3-FC 4 (d); xant(P 9,9-dimethyl-4,5-bis-(diisopropylphosphino)xanthene) with O , CO, and MeO CC?CCO Me have been performed. Under 1 atm pentane solutions afford dinuclear peroxide derivatives [Rh(aryl){? -P,P-xant(P }] (?-O (2a–2d) as yellow solids. In solution, these species are u...

A series of solid-state luminescent dyes based on 2-phenylimidazo[1,2-a]pyridine (PIP) displaying a wide range of emitting colors from blue to red have been developed. Whereas 20-methoxy PIP (20MeOPIP, 10) shows blue luminescence, 20-hydroxy PIP (HPIP, 1) exhibits emission with large Stokes shift at around 500 nm that is known as the excited-state intramolecular proton transfer (ESIPT) luminesc...

Biginelli reaction of ethyl acetoacetate, thiourea and the appropriate aromatic aldehyde was used to produce ethyl 4-aryl-6-methyl-2-thioxo-1,2,3,4-tetrahydropyrimidine-5-carboxylates, that reacted with bromomalononitrile to give ethyl 3-amino-5-aryl-2-cyano-7-methyl-5H-thiazolo[3,2-a]pyrimidine-6-carboxylates rather than the isomeric 7H-thiazolo[3,2-a]pyrimidines. Thiazolopyrimidine derivative...

The title compound, C24H32N4O8S, (I), crystallizes as a zwitterion. The terminal amine N atom of the [(2-{2-[2-(2-ammonio-eth-oxy)eth-oxy]eth-oxy}eth-yl)carbamo-yl] side chain is protonated, while the 1,2,5-thia-diazo-lidin-3-one 1,1-dioxide N atom is deprotonated. The side chain is turned over on itself with an intra-molecular N-H⋯O hydrogen bond. The 1,2,5-thia-diazo-lidin-3-one 1,1-dioxide r...

Abstract. The main aim of this manuscript was to analyze the effect dual task and their difficulty on motor cognitive performance using a postural control memory tasks in middle childhood group ages children, establishing differences between different age groups. study sample composed by one hundred sixteen 8 12 years old. participants completed three single two dual-tasks. (EO) consisted maint...