Iron-Catalyzed C(sp3)–H Alkylation through Ligand-to-Metal Charge Transfer
作者:Tomislav Rovis、Yi Cheng Kang、Sean M. Treacy
DOI:10.1055/s-0040-1720388
日期:2021.10
FeCl3-catalyzed alkylation of nonactivated C(sp3)–H bonds. Photoinduced ligand-to-metal charge transfer at the iron center generates chlorine radicals that then preferentially abstract hydrogen atoms from electron-rich C(sp3)–H bonds distal to electron-withdrawing functional groups. The resultant alkyl radicals are trapped by electron-deficient olefins, and the catalytic cycle is closed by Fe(II) recombination
Efficient Synthesis of Polysubstituted 1,5-Benzodiazepinone Dipeptide Mimetics via an Ugi-4CR-Ullmann Condensation Sequence
作者:Robin Van Den Hauwe、Mathias Elsocht、Steven Ballet、Charlie Hollanders
DOI:10.1055/a-1545-2860
日期:2021.10
three-step synthesis towards 3-amino-1,4-benzodiazepin-2-one derivatives is presented. The versatile Ugi-4-component reaction (Ugi-4CR) and Boc deprotection is followed by a ligand-free Ullmann condensation. This protocol allows the rapid construction of a diverse array of substituted 1,5-benzodiazepinones. Since Ugi-based products are typically limited by their ‘inert’ C-terminal amides, the use of a convertible
The synthesis of the title compound is described and results of some experiments on the degradation of patchoulialcohol are reported.
描述了标题化合物的合成,并报道了有关广oul香醇降解的一些实验结果。
DICHLORO-BIS(TRIFLUOROMETHANESULFONATO)TITANIUM(IV) AS AN EFFECTIVE PROMOTER IN THE CLAISEN ESTER CONDENSATION
作者:Yoo Tanabe、Teruaki Mukaiyama
DOI:10.1246/cl.1984.1867
日期:1984.11.5
Inter- and intra-molecular condensation (the Claisen and the Dieckmann condensations) between ester functions have been effected by the combined use of dichloro-bis(trifluoromethanesulfonato)titanium(IV) and tertiary amine under mild conditions.