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A Concise and Convenient Synthesis of DL-proto-Quercitol and DL-gala-Quercitol via Ene Reaction of Singlet Oxygen Combined with [2 + 4] Cycloaddition to Cyclohexadiene.
Quercitols were easily obtained by ammonolysis of acetate derivatives in MeOH and the outcome of dihydroxylation reactions were supported by conformational analysis.
A New Sulfated α-Ionone Glycoside from Sonchus erzincanicus Matthews
The study describes the isolation and structure elucidation of five flavonoids and two α-ionone glycosides from S. erzincanicus and found corchoionoside C 6’-O-sulfate, isolated for the first time from a natural source, was a new compound.
One-pot synthesis from 1,4-cyclohexadiene of (±)-1,4/2,5-cyclohexanetetrol, a naturally occurring cyclitol derivative
Relationship between chemical structure and antioxidant activity of luteolin and its glycosides isolated from Thymus sipyleus subsp. sipyleus var. sipyleus
One triterpenic acid (ursolic acid), one phenolic acid (rosmarinic acid), and four flavonoids (luteolin, luteolin 7-O-(6”-feruloyl)-β-glucopyranoside, luteolin 5-O-β-glucopyranoside, and luteolin…
Synthesis of 4′‐Hydroxy‐3′‐piperidinomethylchalcone Derivatives and Their Cytotoxicity Against PC‐3 Cell Lines.
The significant improvement of cytotoxicity of 2b, 2d, and 2e against PC-3 cell lines compared with their chalcone precursors suggests that the incorporation of a piperidinomethyl group is a useful molecular modification and further development of these compounds as candidate cytotoxic agents may be warranted.
A concise synthesis of 2-amino-1,2,3,4-tetrahydronaphthalene-6,7-diol ('6,7-ADTN') from naphthalene-2,3-diol
2-Amino-1,2,3,4-tetrahydronaphthalene-6,7-diol (2; 6,7-ADTN) was synthesized starting from naphthalene-2,3-diol in seven steps and with an overall yield of 44%. Methylation of naphthalene-2,3-diol…
One-Step Preparation of Symmetrical 1,4-Diketones from α-Halo Ketones in the Presence of Zn-I2 as a Condensation Agent
Eleven 1,4-diphenylbutane-1,4-diones have been prepared in one step from the corresponding α-halo acetophenones under the action of Zn-I 2 as a condensation agent with moderate to high yields. The…