Molecules, Volume 5, Issue 6

In this paper we describe the synthesis of tetraphenylphosphonium peroxymonosulphate, its crystal structure and packing mode. The asymmetric unit accomodates two independent molecules of the monopersulphate anion, which are held together by hydrogen...

The 6-aryl-1-(3-chloropropanoyl)-4-[(E)-1-(2-furyl)methylidene)]-1,2,3,4-tetrahydro-3-pyridazinones (6a-d) were synthesized by the reaction of acid chloride 3 with α-aracyl(β-2-furyl)acrylic acid hydrazides (2a-d) in a high yield, one pot reaction. O...

Goyazensolide, a biologically active natural product classified as a furoheliangolide, was transformed in a phthalimide derivative that showed an enhanced biological activity against Tripanosoma cruzi. The complex natural product was also reduced wit...

Reaction of 2-hydrazino-3-methyl-3,4-dihydrothieno[2,3-d]pyrimidin-4-one derivatives 2a,b with aliphatic acids afforded the thienotriazolopyrimidinone derivatives 3a-d, with nitrous acid yielded tetrazolothienopyrimidinone derivatives 4a,b and with c...

2-Amino-4,5-di-(2-furyl)furan-3-carbonitrile (1) reacted with triethyl orthoacetate to afford the corresponding 2-ethoxyimine derivative (2). The latter compound reacted with phenyl hydrazine, p-fluorobenzylamine and sodium hydrogen sulfide, respecti...

The purpose of this special festschrift section is to honour the 70th birthday of Boris D. Berezin, Doctor of Chemical Sciences, Professor, Full Member of the Natural Science Academy of the Russian Federation and the founder of porphyrin and phthaloc...

Synthesis of trans-1,2-bis(4-nitro-1-p-methoxybenzylimidazol-5-yl)ethene (1) as an imidazole analogue of stilbene has been reported. In order to confirm the trans geometry of the product using an UV spectral comparison, a mixture of both trans (1) an...

Condensation of 4-benzoyl-1,2-phenylenediamine with sodium pyruvate in acetic acid furnished two products which were identified as 6-benzoyl and 7-benzoyl-3-methyl-2(1H)quinoxalinones (1a,b). Fusion of 1a with aromatic aldehydes furnished the styryl...

A tandem demethylation-cyclisation reaction resulting in the formation of pyran rings using AlCl₃/EtSH reagent under mild reaction conditions is reported. X-ray diffraction studies on the intermediate support the suggested mechanism.

The reduction and oxidation behaviour in alkaline solution of 3,7,13,17-tetramethyl-2,8,12,18-tetrabutylporphyrin (L) has been studied by cyclic voltammetry. The shape of I-E curves was investigated at different terminal values of electrode potential...

The influence of NO₂, Br, and COOH function substituents in various positions of Cu(II)Pc on the reactivity of the latter concerning the dissociation of the metal - nitrogen bonds in proton donor solvents is discussed.

The spectral and solvatation properties of hydrobromides of 3,3^/,4,4^/,5,5^/-hexamethyldipyrromethene-2,2^/, 3,3^/,4,4^/,5^/-pentamethyldipyrromethene-2,2^/,3,3^/,4^/,5,5^/-pentamethyldipyrromethene-2,2^/, 1^/,3,4,5-tetramethyldipyrromethene-2,2^/, 3,4,5-trimethy...

The existence of columnar mesophases (CM) for a new series of the porphyrin derivatives is predicted. With this purpose, the computation of molecular parameters (K, К_c, К_s, K_p, M_m, M_r) is carried out for eighty five molecules, including materials wit...

4-(Trihydro-2H-1,2-thiazole-1,1-dioxide-2-yl)benzophenone (1), 4-(3,5-dimethyl-1`,2`-thiazine-1`,1`-dioxide-2-yl)benzophenone (2), and 4-(tetrahydro-2H-1,2-thiazine-1,1-dioxide-2-yl)benzophenone (6) were obtained from 4-aminobenzophenone and the appr...

The mutual influence of ligands within the structure of Zn-porphyrins on the thermodynamic stability of the latter was investigated.

In this paper we report examples of the Heck reaction in the new moisture stable ambient temperature ionic liquid 1-butyl-3-methylimidazolium hexafluorophosphate ([bmim]PF₆). We have found that the yield of product is comparable with Heck reactions c...

Phenolic enamino compounds, prepared from 2-(4-hydroxyphenyl)-ethylamine and the corresponding β-keto carbonyl compounds, afford spiro cyclohexadienone derivatives on reaction with hypervalent iodine reagents.

Four new ms-tetrasubstituted β-octaalkylporphyrins are synthesized and their spectral properties are discussed.

The solubility in benzene and ethanol of 2,8,12,18-tetramethyl-3,7,13,17-tetrabuthylporphyrin with various substituents in the5,15-positions of the molecule is investigated. A comparative analysis of the influence of alkyl substituents on porphyrin s...