An efficient oxidative NHC-catalyzed one-step transformation of (S)- or (R)-8-oxocitronellal to nepetalactone (NL) in enantio- and diastereomerically pure form has been developed. Several new and "easy to make" N-Mes- or N-Dipp-substituted 1,2,4-triazolium salts carrying nitroaromatic groups on N1 were synthesized and evaluated as precatalysts in combination with base and stoichiometric organic oxidant
Direct Hydrofluorination of Methallyl Alkenes Using a Methanesulfonic Acid/Triethylamine Trihydrofluoride Combination
作者:Xavier Bertrand、Jean-François Paquin
DOI:10.1021/acs.orglett.9b03950
日期:2019.12.6
The use of a methanesulfonic acid/triethylamine trihydrofluoride combination for the direct hydrofluorination of methallyl-containing substrates is reported. Under those metal-free conditions that use readily available, cheap, and easy to handle reagents, a range of methallyl alkenes could be converted to their corresponding tertiary fluoride in up to 78% yield. Finally, a promising result for the
Reported is the generation of aromatic N-heterocyclic radicals and their application in hydroamination, amidosulfenylation and bromoamination of unactivated alkenes. The resulting alkylated N-heterocyclic amines serve as important and versatile scaffolds that can be easily transformed into diverse functionalized molecules. Experimental data on the mechanism are presented.
The present invention relates to a perfume precursor represented by formula (1). (In formula (1), R1 represents a hydrogen atom, a C1-C12 alkyl group, a hydroxy group, a methoxy group, or an ethoxy group; R2 represents a single bond, a C1-C2 alkylene group which may have a substituent, or a vinylene group which may have a substituent; R3 represents a residue obtained by removing one hydrogen atom of a hydroxy group from a C5-C20 perfume alcohol or a phenol which may have a substituent.)