The reaction of dimethyl acetylenedicarboxylate with OH-acid such as 2-naphthol in the presence of trimethyl or triphenyl phosphite under solvent-free conditions produce oxaphosphaphenanthrene derivatives in good yields. Also, the reaction of dimethyl acetylenedicarboxylate and trimethyl phosphite in the presence of 1-naphthol leads to succinate derivatives in excellent yields. Using triethyl p...

The title compound, C(27)H(27)N(7)O(6), a Schiff base, was synthesized by the reaction of triethyl-enetetra-mine with 3-nitro-benzealdehyde. There are two independent mol-ecules in the asymmetric unit. The central aromatic ring in one mol-ecule makes dihedral angles of 23.99 (7) and 20.06 (6)° with the two terminal rings; for the second mol-ecule, these angles are 26.14 (6) and 24.64 (6)°.

Effect of temperature on the chemiluminescence (CL) of Luminol in some aqueous aliphatic amines such as ethyl amine (EA), diethyl amine (DEA), and triethyl amine (TEA), have been studied and reported. On the basis of experimental results, it is found that the chemiluminescence intensity initially increased with temperature, attains an optimum value of particular temperature and then decrease on...

The title compound, C(24)H(21)N(3)O, was prepared by the reaction of (Z)-2-(1H-indol-3-ylmethyl-ene)-1-aza-bicyclo-[2.2.2]octan-3-one with α-bromo-p-toluonitrile, under phase-transfer catalytic (PTC) conditions using triethyl-benzyl-ammonium chloride and 50% w/v aqueous NaOH solution in dichloro-methane. The crystal structure indicates the presence of a double bond with Z geometry connecting th...

The title co-crystal, C(6)H(12)N(2)·C(6)H(6)O(2), is composed of neutral resorcinol and triethyl-enediamine mol-ecules in which the resorcinol mol-ecules came from the in situ deca-rboxylation of 2,4-dihy-droxy-benzoic acid. In the crystal, the components are connected by O-H⋯N hydrogen bonds, forming a chain in the b-axis direction.

The title compound, C(34)H(54)Br(2)N(2)O(6), was obtained by the Michael addition-elimination reaction of (5S)-5-(l-menthyl-oxy)-3,4-dibromo-furan-2(5H)-one with 1,6-hexa-nediamine in the presence of triethyl-amine. The crystal structure contains two chiral five-membered furan-one rings, in twist and envelope conformations, and two six-membered cyclo-hexane rings in chair conformations.

A simple and efficient one pot synthesis of 2-amino-4H-chromen-4-yl phosphonate derivatives has been accomplished by the condensation of salicylaldehyde, malononitrile/ethylcyanoacetate and triethyl phosphite/trimethyl phosphite in the presence of molecular iodine as catalyst in water at room temperature. All the reactions were very clean and the products were obtained in very good to excellent...

A practical method was elaborated for the synthesis of (aminomethylene)bisphosphine oxides comprising the catalyst- and solvent-free microwave-assisted three-component condensation of primary amines, triethyl orthoformate and two equivalents of diphenylphosphine oxide. The method is also suitable for the preparation of (aminomethylene)bisphosphonates using (MeO)2P(O)H/(MeO)3CH or (EtO)2P(O)H/(E...