2000 April - 25 articles
From the aerial parts of Hypericum perforatum L. we have isolated phloroglucinol 1 (see the formula), a homologue of 2, the latter isolated previously from the same extract and identified by 2D NMR (DQF COSY, PS NOESY, TOCSY, HSQC and HMBC) [1].[...]
The product 2 was prepared from menthyl phenylsulfonyl acetate in situ by the solid-liquid PTC conditions without solvent.[...]
6-S-Trityl-mercapto-hexan-1-ol is an important compound, because its O-b-cyanoethyl-N , N-diisopropyl phosphoramidite derivative is the most widely used building block for the synthesis of 5'-thiol modified oligonucleotides.[...]
Menthyl phenylsulfonyl acetate was prepared from methyl phenylsulfonyl acetate by solid-liquid PTC trans-esterification conditions without a solvent [1].[...]
The experimental procedure follows the general synthesis of arylalkynes reported by Sonogashira [1].[...]
The product 2 was prepared via a direct condensation under solid-liquid phase transfer catalysis (S.L.P.T.C.) [1] conditions.[...]
The product 2 was prepared via a direct condensation under solid-liquid phase transfer catalysis (S.L.P.T.C.) [1] conditions.[...]
The product 2 was prepared via a direct condensation under solid-liquid phase transfer catalysis (S.L.P.T.C.) [1] conditions.[...]
The product 2 was prepared via a direct condensation under solid-liquid phase transfer catalysis (S.L.P.T.C.) [1] conditions.[...]
The product 2 was prepared via a direct condensation under solid-liquid phase transfer catalysis (S.L.P.T.C.) [1] conditions.[...]
The product 2 was prepared via a direct condensation under solid-liquid phase transfer catalysis (S.L.P.T.C.) [1] conditions.[...]
The product 2 was prepared via a direct condensation under solid-liquid phase transfer catalysis (S.L.P.T.C.) [1] conditions.[...]
The product 2 was prepared via a direct condensation under solid-liquid phase transfer catalysis (S.L.P.T.C.) [1] conditions.[...]
The product 2 was prepared via a direct condensation under solid-liquid phase transfer catalysis (S.L.P.T.C.) [1] conditions.[...]
The product 2 was prepared via a direct condensation under solid-liquid phase transfer catalysis (S.L.P.T.C.) [1] conditions.[...]
The title compound, an important antiviral agent [1] was prepared from commercially available 1-aminoadamantane by titanium(IV) isopropoxide mediated reductive amination of formaldehyde [2].[...]
The title compound, a novel electron donor-acceptor system [1] was prepared [2] by refluxing a suspension of commercially available 2,3-dichloro-1,4-naphthoquinone in absolute ethanol and morpholine in the presence of anhydrous potassium carbonate.[...]
Thionyl chloride (2.18 ml, 3.56 g, 30 mmol, 1.5 eq) was added dropwise to a vigorously stirred solution of p-tolylacetic acid (3 g, 20 mmol, 1 eq) and heated to 100°C for 3 hours.[...]
This is a new edition of the book published under the same title by Chapman and Hall in 1981.[...]
Reaction of enone (11) with the bifunctional Grignard reagent (7) in the presence of copper(I) bromide – dimethyl sulfide, followed by intramolecular alkylation of the resultant chloroketone (15) gave the tricyclic ketone (12). The tricyclic ketone (...
The diastereomeric mixture of (R)-2-(methoxycarbonylmethyl)-N-(R)-1-(1-phenylethyl) succinimide 11s and (S)-2-(methoxycarbonylmethyl)-N-(R)-1-(1-phenylethyl) succinimide 11a was synthesized by reaction of 2-(carboxymethyl)succinic anhydride 6 with (R...
Thermolysis of semicarbazones (I) to azines (II) occurs through reactive N-substituted isocyanate intermediates (Ia) which can be converted in situ to carbamates and Nsubstituted ureas.
The evaluation of human leucocite elastase inhibition by phosphate esters (1-2) and phosphate mixed anhydride (3) of penicillin sulfones and their precursor sulfides is described.
The insecticidal activities of several cyanohydrins, cyanohydrin esters and monoterpenoid esters (including three monoterpenoid esters of a cyanohydrin) were evaluated. Topical toxicity to Musca domestica L. adults was examined, and testing of many c...
Cycloaddition of C,N-diphenylnitrone to α-methylene-γ-butyrolactone afforded two diastereomeric 5-spirosubstituted isoxazolidines with high selectivity. Structural assignment was ascertained by NMR studies and an X-ray diffraction experiment on a sin...
