Compounds of formula (I), wherein G represents together with the two carbon atoms of the pyrimidine ring to which it is attached, a 5- to 7-membered aliphatic carbocyclic or heterocyclic ring system which contain 0 to 2 heteroatoms selected from the group consisting of nitrogen, oxygen and sulfur; and wherein said 5- to 7-membered aliphatic carbocyclic or heterocyclic ring system can be mono-, di- or trisubstituted by substituents selected from the group consisting of halogen, keto, C1-C6alkyl, C1-C6alkoxy, C1-C6alkyloximino and C1-C6alkylendioxy; and wherein the other substituents R1, R2, R3, R4, R5 and R6 are as defined in claim 1, and their use as microbicides.
The Dual Role of Benzophenone in Visible-Light/Nickel Photoredox-Catalyzed C−H Arylations: Hydrogen-Atom Transfer and Energy Transfer
作者:Abhishek Dewanji、Patricia E. Krach、Magnus Rueping
DOI:10.1002/anie.201901327
日期:2019.3.11
A dual catalytic protocol for the direct arylation of non‐activated C(sp3)−H bonds has been developed. Upon photochemical excitation, the excited triplet state of a diaryl ketone photosensitizer abstracts a hydrogen atom from an aliphatic C−H bond. This inherent reactivity was exploited for the generation of benzylic radicals which subsequently enter a nickel catalytic cycle, accomplishing the benzylic
Enantio‐ and Regioselective Palladium(II)‐Catalyzed Dioxygenation of (Aza‐)Alkenols
作者:Sabrina Giofrè、Letizia Molteni、Donatella Nava、Leonardo Lo Presti、Egle Maria Beccalli
DOI:10.1002/anie.202109312
日期:2021.9.27
An oxidative Pd-catalyzed intra-intermolecular dioxygenation of (aza-)alkenols has been reported, with total regioselectivity. To study the stereoselectivity, different chiral ligands as well as different hypervalent-iodine compounds have been compared. In particular, by using a C-6 modified pyridinyl-oxazoline (Pyox) ligand and hypervalent iodine bearing an aromatic ring, an excellent enantio- and
Switchable Oxidative Reactions of <i>N</i>-allyl-2-Aminophenols: Palladium-Catalyzed Alkoxyacyloxylation vs an Intramolecular Diels–Alder Reaction
作者:Sabrina Giofrè、Manfred Keller、Leonardo Lo Presti、Egle M. Beccalli、Letizia Molteni
DOI:10.1021/acs.orglett.1c02539
日期:2021.10.15
The Pd(II)-catalyzed reaction of N-allyl-2-aminophenols in the presence of PhI(OCOR)2 as the oxidant resulted in an alkoxyacyloxylation process, with the formation of functionalized dihydro-1,4-benzoxazines. The reaction performed in the absence of palladium catalyst switched to an intramolecular Diels–Alder reaction (IMDA) pathway, which was the result of an oxidative dearomatization of the 2-aminophenol
Compounds of formula (I), wherein G represents together with the two carbon atoms of the pyrimidine ring to which it is attached, a 5- to 7-membered aliphatic carbocyclic or heterocyclic ring system which contain 0 to 2 heteroatoms selected from the group consisting of nitrogen, oxygen and sulfur; and wherein said 5- to 7-membered aliphatic carbocyclic or heterocyclic ring system can be mono-, di- or trisubstituted by substituents selected from the group consisting of halogen, keto, C
1
-C
6
alkyl, C
1
-C
6
alkoxy, C
1
-C
6
alkyloximino and C
1
-C
6
alkylendioxy; and wherein the other substituents R
1
, R
2
, R
3
, R
4
, R
5
and R
6
are as defined in claim
1
, and their use as microbicides.