Scalable and safe synthetic organic electroreduction inspired by Li-ion battery chemistry
作者:Byron K. Peters、Kevin X. Rodriguez、Solomon H. Reisberg、Sebastian B. Beil、David P. Hickey、Yu Kawamata、Michael Collins、Jeremy Starr、Longrui Chen、Sagar Udyavara、Kevin Klunder、Timothy J. Gorey、Scott L. Anderson、Matthew Neurock、Shelley D. Minteer、Phil S. Baran
DOI:10.1126/science.aav5606
日期:2019.2.22
Scaled-up sodium-free Birchreductions The so-called Birchreduction is frequently used by chemists despite its daunting conditions: Pyrophoric sodium is dissolved in pure liquified ammonia to achieve partial reduction of aromatics. Peters et al. surveyed and then optimized small-scale electrochemical alternatives to devise a safer protocol that can work on a larger scale with a broad range of functionally
Catalytic Cyclophanes. Part VIII. Cytochrome P-450 activity of a porphyrin-bridged cyclophane
作者:David R. Benson、Robert Valentekovich、Suk-Wah Tam、Fran�ois Diederich
DOI:10.1002/hlca.19930760519
日期:1993.8.11
porphyrin-cyclophane 1 having a porphyrin attached by two straps to an apolar cyclophane binding site was prepared. Upon metallation, the ZnII and FeIII derivatives 2 and 3, respectively, were obtained in good yields. Treatment of 3 with base yielded the μ-oxo dimer 4 in which the two oxo-bridged porphyrins moieties are both capped by cyclophane binding sites. All compounds 1–4 are freely soluble in protic solvents
Towards the enantioselective synthesis of (−)-euonyminol – preparation of a fully functionalised lower-rim model
作者:Matthew J. Webber、Sarah A. Warren、Damian M. Grainger、Matthew Weston、Stacy Clark、Steven J. Woodhead、Lyn Powell、Stephen Stokes、Alexander Alanine、Jeffrey P. Stonehouse、Christopher S. Frampton、Andrew J. P. White、Alan C. Spivey
DOI:10.1039/c3ob27187k
日期:——
oxygenation pattern on its ‘lower-rim’ as found in the natural sesquiterpene (−)-euonyminol (1) and it is expected that the route described should be applicable to the synthesis of that complex natural product. (−)-Euonyminol is found as the core scaffold of a series of complex macrodilactone sesquiterpenoids isolated from the Celastraceae which possess interesting biological activities (e.g. anti-HIV
<sup>13</sup>C-NMR.-Spektroskopie von Organolithiumverbindungen bei tiefen Temperaturen. Strukturinformation aus der<sup>13</sup>C,<sup>6</sup>Li-Kopplung
作者:Dieter Seebach、Robert Hässig、Josef Gabriel
DOI:10.1002/hlca.19830660128
日期:1983.2.2
Low-Temperature 13C-NMR. Spectroscopy of Organolithium Derivatives. - 13C, 6Li-Coupling, a Powerful Structural Information