A Highly Effective One-Pot Synthesis of Quinolines from 2-Alkynylnitrobenzenes
摘要:
A highly effective one-pot synthesis of poly-substituted quinolines from 2-alkynylnitrobenzenes using inexpensive reagents has been developed. Reaction of 2-alkynylnitrobenzenes with Sn/HCl in EtOH resulted in the formation of 2-aminophenyl ketones and subsequently condensed in situ with ketones to form tri-substituted quinolines in 80-97% yields.
One-Pot Synthesis of Spirocyclopenta[<i>a</i>]indene Derivatives via a Cascade Ring Expansion and Intramolecular Friedel–Crafts-Type Cyclization
作者:Quanzhe Li、Jiaxin Liu、Yin Wei、Min Shi
DOI:10.1021/acs.joc.9b03126
日期:2020.2.21
A one-pot efficient synthetic approach for the rapid construction of spirocyclopenta[a]indene derivatives has been developed via an iodine-initiated cascade ring expansion and intramolecular Friedel-Crafts-type cyclization from propargyl alcohol-tethered alkylidenecyclobutanes under mild conditions with broad substrate scope. This cascade process can be elegantly conducted on a gram scale. A plausible
Reactivity of trihexyl(tetradecyl)phosphonium chloride, a room-temperature phosphonium ionic liquid
作者:Ming-Chung Tseng、Huang-Chuan Kan、Yen-Ho Chu
DOI:10.1016/j.tetlet.2007.10.131
日期:2007.12
deuterium isotope exchange reaction in deuterated solvents. Under basic conditions, ionic liquid 1 was reactive and 50% deuterium exchanged on all four P–CH2 methylene groups in 9 h at ambient temperature, 30 min at 50 °C, or 12 min at 65 °C. In addition, ionic liquid 1 reacted with sodium salts of substituted benzoates apparently through the direct SN2 carboxylate alkylation to form esters 2 and the
Because most pharmacologically active receptors are inherently asymmetric, the introduction of asymmetry into molecules that can bind to such receptors is a central topic in modern organic and bioorganic chemistry. We developed a metal charge-directed stereoinduction process in the asymmetrictransferhydrogenation of ketones catalyzed by first-row transition-metal (iron, cobalt, and nickel) amido
through the degradation of lignin, a naturally abundant and renewable resource. The acridine skeleton, commonly found in drug molecules, holds significant medicinal and synthetic value. Herein, we present a synthesis of tetrahydroacridines through the use of palladium as a catalyst, employing 2-aminoarylketones and phenols as key starting materials.