A new method for the catalytic enantioselective formal arylation of azlactones using quinones as the aromatic partner was developed for the first time. Under mild conditions, the domino Michael/aromatization/cyclization reaction worked well to afford the corresponding products in moderate to high yields with excellent enantioselectivities, some of which have promising cytotoxicity against cance...

In recent years, there has been increasing recognition of the importance of steroid aromatization in organs besides the steroidogenic ones. Estrogens formed from C-19 precursors in peripheral tissues can clearly contribute to the levels of estrogens in the circulation, while aromatization in target cells may be an important determinant of the concentration of estrogens to which a particular pop...

In order to study the initial as well as the final steps in the aromatization of androgens to estrogens, highspecific activity [ 19-CSHs]androstenedione and testosterone were synthesized. Incubations of [ 19-CSHs]androstenedione with human placental microsomes resulted in the generation of [‘Hlwater, as a result of the dual hydroxylation at (2-19, and [’Hlformic acid reflecting final aromatizat...

Pine rosin of Pinus merkusii Jung at de Vriese is produced industrially from a distillation process pine sap. The high total Indonesian production leads the primary derivatization strategy into several derivates to fulfill market demand. Abietic acid (AA) major compound in rosin, used as object observation this study. general methodology for transformation reported involves using palladium (Pd)...

Methane, the main component of natural gas, is an interesting source chemicals and clean liquid fuels, a promising alternative raw material to oil. Among possible direct routes for methane conversion, its aromatization under non-oxidative conditions has received increasing attention, despite low conversions obtained due thermodynamic limitations, because high selectivity benzene. Mo/H-ZSM-5, fi...

This paper describes step-economic iodine-mediated construction of functionalized arylazopyrazoles in the presence of catalytic AgNO3 starting from simple β-ketoesters and two equivalents of arylhydrazines. This cascade reaction includes in situα-iodination of β-ketoesters, pyrazol-3-one formation, substitution with a nitrogen nucleophile, and oxidation/aromatization.

An efficient amine-/ruthenium-catalyzed three-step process for the synthesis of Nefopam analogues was achieved through combinations of cascade enamine amination/iso-aromatization/allylation and diene or enyne metathesis as key steps starting from functionalized Hagemann's esters. In this communication, we discovered the application of ruthenium-catalysis on olefins containing free amines withou...

DANNENBERG and HEBENBROCK obtained a fluorescent hydrocarbon, C27H34, by refluxing vitamin D3 with chloranil in anisole (bp 155.5•Ž) for 1 hr (35% yield), to which a structure possessing the styryl indene chromophore was assigned (1). During the course of our study on a fl uorometric determination of vitamin D, we found this reaction to be unsuited for analytical purposes mainly because of its ...

BACKGROUND Repeated electroacupuncture (EA) stimulation is known to stimulate the activity of the hypothalamus-pituitary-adrenal axis, and to enhance the circulation level of estrogen in the ovariectomized rats. To explore the source of the increased circulation estrogen, the extragonadal aromatization was detected. METHODS Female rats were divided into five groups: 1) intact (INT), 2) intact...

The first synthesis and characterization of [9]-, [12]-, and [18]cycloparaphenylene was demonstrated utilizing a novel aromatization reaction. We refer to these fascinating structures as "carbon nanohoops" due to their structural similarity to carbon nanotubes. Additionally, we have utilized computational methods to understand the unique properties of these fully conjugated macrocycles.