The present invention relates to compounds formula (I), wherein P is P1, P2, heterocyclyl or heterocyclyl substituted by one to five Z; and wherein A
1
, A
2
, A
3
, A
4
, G
1
, R
1
, R
2
, R
3
, R
4
, R
5
, R
6
, R
17
, R
18
, R
19
and R
20
are as defined in claim
1
; or a salt or N-oxide thereof. Furthermore, the present invention relates to processes and intermediates for preparing compounds of formula (I), to insecticidal, acaricidal, nematicidal and molluscicidal compositions comprising the compounds of formula (I) and to methods of using the compounds of formula (I) to control insect, acarine, nematode and mollusc pests.
Ground-State Electron Transfer as an Initiation Mechanism for Biocatalytic C–C Bond Forming Reactions
作者:Haigen Fu、Heather Lam、Megan A. Emmanuel、Ji Hye Kim、Braddock A. Sandoval、Todd K. Hyster
DOI:10.1021/jacs.1c04334
日期:2021.6.30
The development of non-natural reactionmechanisms is an attractive strategy for expanding the synthetic capabilities of substrate promiscuous enzymes. Here, we report an “ene”-reductase catalyzed asymmetric hydroalkylation of olefins using α-bromoketones as radical precursors. Radical initiation occurs via ground-state electrontransfer from the flavin cofactor located within the enzyme active site
The copper-catalyzed [4 + 2] annulation of α,β-unsaturated ketoximeacetates with 1,3-dicarbonyl compounds for the synthesis of three classes of structurally diverse pyridines has been developed. This method employs 1,3-dicarbonyl compounds as C2 synthons and enables the synthesis of multifunctionalized pyridines with diverse electron-withdrawing groups in moderate to good yields. The mechanistic investigation
Tandem Wittig Reaction–Ring Contraction of Cyclobutanes: A Route to Functionalized Cyclopropanecarbaldehydes
作者:Federico Cuccu、Lorenzo Serusi、Alberto Luridiana、Francesco Secci、Pierluigi Caboni、David J. Aitken、Angelo Frongia
DOI:10.1021/acs.orglett.9b02690
日期:2019.10.4
An original tandem reaction consisting of a Wittig reaction-ring contraction process between α-hydroxycyclobutanone and phosphonium ylides has been developed. Highly functionalized cyclopropanecarbaldehydes are obtained in good to high yield.
Regio- and Diastereoselective Synthesis of Novel Polycyclic Pyrrolo[2,1-a]isoquinolines Bearing Indeno[1,2-b]quinoxaline Moieties by a Three-Component [3+2]-Cycloaddition Reaction
regio- and diastereoselective synthesis of 2,3-dihydro-10b′H-spiro[indeno[1,2-b]quinoxaline-11,1′-pyrrolo[2,1-a]isoquinoline]-2′,3′-diylbis(phenylmethanone) derivatives containing four contiguous chiral stereocenters was achieved through1,3-dipolarcycloaddition of isoquinolinium N-ylides in a one-pot three-component reaction. The desired products were obtained in short reaction times and in moderate to
2,3-dihydro-10b'H-spiro[indeno[1,2-b]quinoxaline-11,1'-pyrrolo[2,1-a]isoquinoline]-2',3'的区域选择性和非对映选择性合成通过在一锅三组分反应中异喹啉鎓 N-叶立德的 1,3-偶极环加成反应,获得了含有四个连续手性立体中心的 -二基双(苯基甲酮)衍生物。在相对温和的反应条件下,在较短的反应时间内以中等至高产率(高达 92%)获得所需产物。通过 X 射线衍射分析证实了所需产物的结构和相对立体化学。