The title compound, C(25)H(21)ClO(2), was synthesized via the three-component coupling of 4-chloro-benzaldehyde, 2-naphthol and 5,5-dimethyl-cyclo-hexane-1,3-dione. The pyran ring adopts a boat conformation, while the cyclo-hexenone ring is in an envelope conformation. The 4-chloro-phenyl ring is almost perpendicular to the pyran ring [dihedral angle = 87.39 (1)°]. In the crystal, mol-ecules ar...

MACLEOD, R. A., HOGENKAMP, H., AND ONOFREY, E. 1958 Nutrition and metabolism of marine bacteria. VII. Growth response of a marine Flavobacterium to surface active agents and nucleotides. J. Bacteriol., 75, 460-465. MICKINNEY, R. E. AND HORWOOD, M. P. 1952 Fundamental approach to the activated sludge process. I. Floc-producing bacteria. Sewage and Ind. Wastes, 24, 117-560. MCKINNEY, R. D. AND WE...

We investigate the OH stretch vibrational frequency shifts of a prototype photoacid, 2-naphthol (2N), when dissolved in solvents of low polarity. We combine femtosecond mid-infrared spectroscopy and a theoretical model based on the Pullin-van der Zwan-Hynes perturbative approach to explore vibrational solvatochromic effects in the ground S(0) and the first electronically excited (1)L(b) states....

The development of a Ni(II) (S)-Tol-BINAP-catalyzed enantioselective alkylation of N-acylthiazolidinethiones with trimethyl orthoformate is described. The reaction is general with respect to the thiazolidinethione, providing the desired adducts in good to excellent yield and with high levels of enantioselectivity (11 examples, 51-92% yield, 90-99% ee). The products are readily converted into a ...

a new kinetic spectrophotometic method for the determination of trace amount chromium (iii) in teareal samples has been described based on it s the catalytic effect on the oxidations of 1 - ( 2 –pyridylazo ) - 2 - naphthol, (pan), by potassium bromated in sulfuric acid. the reaction is followedspec- trophotometrically by measuring the decrease in the absorbance at 469 nm. under the optimumcondi...

In this work, Fe3O4@nano-walnut shell/BIII (FNWSB), as a reusable and new catalyst was prepared then characterized by FT-IR, XRD, FESEM, EDS-MAP, TGA. This used for synthesis of tetrahydrobenzo[a]xanthen-11-ones via three-component, one-pot condensation reaction dimedone, β-naphthol, aromatic aldehydes. An uncomplicated work-up, high yields product, short times, use low-cost are considerable ad...

peptide synthesis. Enzymatic peptide synthesis is more advantageous than chemical synthesis since the enzymatic method is stereoselective and is secure from racemization. There are, however, several problems to be solved with this method. Secondary hydrolysis of the resulting peptide may arise from the inherent nature of the protease. Moreover, the method is limited to the use of amino acid der...

melamine trisulfonic acid (mtsa) is utilized as a highly efficient catalyst for the solvent-free condensation reaction of 2-naphthol (2 eq.) with arylaldehydes (1 eq.) under conventional thermal as well as microwave conditions to give the d