Synthesis of Chiral C<sub>2</sub>-Symmetric 1,10-Phenanthrolines from Naturally Occurring Monoterpenes
作者:Giorgio Chelucci、Giovanni Loriga、Gabriele Murineddu、Gerard A. Pinna
DOI:10.1055/s-2003-36260
日期:——
A convenient procedure for the preparation of chiral C2 -symmetric 1,10-phenanthrolines bearing a chiral framework in the form of a cycloalkeno-condensed substituent in the 2,3-and 8,9-positions of the heterocycle is reported. Starting from the 2-benzyloxycyclohexanone, four 1,10-phenanihrolines derived from (-)-β-pinene, (+)-α-pinene, (-)-isopinocampheol, and (+)-camphor were prepared according to
Pellet, Michele; Huet, Francois; Conia, Jean-Marie, Journal of Chemical Research, Miniprint, 1982, # 9, p. 2552 - 2578
作者:Pellet, Michele、Huet, Francois、Conia, Jean-Marie
DOI:——
日期:——
Syntheses using monoketals of cyclohexane-1: 2-dione. Part I. 2-Oxocyclohexane-1-spiro-2′-1′: 3′-dioxolan and the corresponding oxathiolan and dithiolan
作者:R. H. Jaeger、Herchel Smith
DOI:10.1039/jr9550000160
日期:——
Efficient hydrolysis of dithioacetals by the N-fluoro-2,4,6-trimethylpyridinium triflate-water system
作者:Alexander S. Kiselyov、Lucjan Strekowski、Victor V. Semenov
DOI:10.1016/s0040-4020(01)80359-8
日期:1993.3
Dithioacetals including 1,3-dithianes and 1,3-dithiolanes are efficiently cleaved by the title reagent system to the parent carbonyl compounds. The cleavage of diprotected symmetrical alpha-diketones and p-phenylene-diketones gives monoketones in good yields. Amide, 1,3-dioxolane, disulfide, ester, ether, hydroxy, nitrile, nitro, and sulfide functions are relatively stable under the cleavage conditions but thiols are oxidized to disulfides.