Copper-catalyzed C–C bond-forming transformation of CO<sub>2</sub> to alcohol oxidation level: selective synthesis of homoallylic alcohols from allenes, CO<sub>2</sub>, and hydrosilanes
A highly selective carbon-carbon bond-forming transformation of carbon dioxide (CO2) to the alcoholoxidation level has been disclosed. By employing a copper/bisphosphine catalyst system and hydrosilanes as the mild and...
Synthesis of Racemic Δ<sup>3</sup>-2-Hydroxybakuchiol and Its Analogues
作者:Lei Shi、Xinsheng Lei、Jiange Zhang、Guoqiang Lin
DOI:10.1002/hlca.200900243
日期:2010.3
The first synthetic approach to (±)‐Δ3‐2‐hydroxybakuchiol (=4‐[(1E,5E)‐3‐ethenyl‐7‐hydroxy‐3,7‐dimethylocta‐1,5‐dien‐1‐yl]phenol; 14) and its analogues 13a–13f was developed by 12 steps (Schemes 2 and 3). The key features of the approach are the construction of the quaternary C‐center bearing the ethenyl group by a Johnson–Claisen rearrangement (→6); and of an (E)‐alkenyl iodide via a Takai–Utimoto
Efficient Electrophilic Fluorination for the Synthesis of Novel 2′-Fluoro-3′-Methyl-5′-Deoxyphosphonic Acid Apiosyl Nucleoside Analogues
作者:Kyung Mi Kim、Joon Hee Hong
DOI:10.1080/15257770.2013.832774
日期:2013.10.3
Novel 5-deoxyapiosyl purine phosphonic acid analogues with a 2-electropositive moiety, such as, a fluorine atom were designed and synthesized from commercially available hydroxylacetone. Condensation of a glycosyl donor 10 with purines under Vorbruggen conditions and cross-metathesis give the desired nucleoside phosphonic acid analogues 14, 17, 21, and 24. The synthesized nucleoside analogues were subjected to antiviral screening against HIV-1, and the adenine analogue 17 exhibited weak in vitro anti-HIV-1 activity (EC50 = 26.6M)