Results 81 to 90 of about 81,584 (205)

Phosphine-Catalyzed (3 + 2) Annulation of δ‑Acetoxy Allenoates with 2‑Sulfonamidomalonate: Synthesis of Highly Substituted 3‑Pyrrolines and Mechanistic Insight

, 2018
A mild and efficient synthetic protocol for 3-pyrrolines via the phosphine-catalyzed (3 + 2) annulation of δ-acetoxy allenoates with 2-sulfonamidomalonate is reported. The asymmetric version (up to 83% ee) is also achieved by using phosphine (R)-SITCP as
Dong Wang (73290), Xiaofeng Tong (1490881), Yang Hong (124259), Wei Liu (20030)   +3 more
core   +1 more source

Phosphine-Catalyzed Cascade Michael Addition/[4+2] Cycloaddition Reaction of Allenoates and 2‑Arylidene-1,3-indanediones

, 2020
The phosphine-catalyzed cascade Michael addition/[4+2] cycloaddition reaction of tetrahydrobenzofuranone-derived allenoates and 2-arylidene-1,3-indanediones has been reported, affording spirocyclic 1,3-indanedione derivatives in moderate to high yields ...
Jiaqing Xu, Yongjun Wu (296003), Biming Mao, Biming Mao (2917877), Xuefeng Li (263255), Hongchao Guo, Wangyu Shi, Xuefeng Li, Qijun Wang (3896791), Yongjun Wu, Wei Wang (17594), Hongchao Guo (1538041), Jiaqing Xu (8596197), Wei Wang, Qijun Wang, Wangyu Shi (4606462)   +15 more
core   +1 more source

Phosphine-Catalyzed Enantioselective [4 + 2] Cycloaddition–Semipinacol-Type-Rearrangement Reaction of Morita–Baylis–Hillman Carbonates

, 2018
The chiral phosphine-triggered electrophilic ylide intermediate for a Morita–Baylis–Hillman carbonates activation strategy provides a promising method for the design of organocatalytic intermolecular higher-order annulation ...
Xianxing Jiang, Xianxing Jiang (1555024), Sihua Hong (5463833), Lu Gan (33435), Yuan Zhong, Lu Gan, Sihua Hong, Yuan Zhong (205199), Xiaoyun Zhao (5463836), Xiaoyun Zhao   +9 more
core   +1 more source

Modeling the Efficacy of Phosphine on Eggs of Major Stored-Product Insect Species: Investigating Strains with Varying Susceptibility Levels

Agriculture
Phosphine is a widely utilized fumigant insecticide in stored-product facilities; however, its excessive application and improper usage have contributed to the emergence of resistance in insect populations.
Marina Gourgouta, Maria K. Sakka, Evmorfia P. Bataka, M. Carolin Götze, Christos T. Nakas, Christos G. Athanassiou   +5 more
doaj   +1 more source

Source of phosphine on Venus—An unsolved problem

Frontiers in Astronomy and Space Sciences
The tentative detection of ppb levels of phosphine (PH3) in the clouds of Venus was extremely surprising, as this reduced gas was not expected to be a component of Venus’ oxidized atmosphere.
William Bains, William Bains, Sara Seager, Sara Seager, Sara Seager, David L. Clements, Jane S. Greaves, Paul B. Rimmer, Janusz J. Petkowski, Janusz J. Petkowski, Janusz J. Petkowski   +10 more
doaj   +1 more source

Phosphine-scavenging role of gold(I) complexes from Pd(PtBu3)2 in the bimetallic catalysis of carbostannylation of alkynes

, 2017
Density functional theory (DFT) at the M06 level was utilized to compare the reactivity of Pd(PtBu3)2 with that of Pd2(dba)3 in catalyzing carbostannylation of alkynes in the presence of [AuL]+, where L is a phosphine ligand.
Sereshk, AV (15673370), Brian Yates (14753611), Javidy, SA (15673367), Khaledifard, Y (15673364), Nasiri, B (15645494), Alireza Ariafard (14730544)   +5 more
core  

Phosphine-Catalyzed (4 + 2) Annulation of Allenoates Bearing Acidic Hydrogen with 1,1-Dicyanoalkenes

α-succinimide-substituted allenoates were employed as phosphine acceptors in phosphine-catalyzed (4 + 2) annulation with 1,1-dicyanoalkenes.
Shiben Wang (17614022), Zhenzhen Gao (517508), Honglei Liu (1538044), Hongchao Guo (1538041), Xuekun Wang (1885210), Xiaoming Zhou (308488), Lei Xie (61344)   +6 more
core   +1 more source

How does insect resistance to phosphine affect insect control costs of stored-grain?

Crop Production/Industries,
Mann, John T., Adam, Brian D., Arthur, Frank   +2 more
core  

Resistance of Stored Grain Pests to Phosphine and Its Integrated Management Strateg

Liang you shipin ke-ji
The fumigant has been approved by the World Health Organization for use in grain storage, targeting the eradication of pests in areas where grain is stored or transported to reduce insect and mold activities, thereby minimizing storage losses.
ZHANG Hui-yan, CHEN Xin, ZHANG Hong-qing, LI Yan-yu, TIAN Xiao-wei, ZHOU Gui-ming, TAO Hai-hua, GONG Jian-min   +7 more
doaj   +1 more source

Phosphine-Promoted Divergent Annulations of δ‑Acetoxy Allenoates with α‑Hydroxy-β-carbonyl Ester Derivatives: Synthesis of Tetrasubstituted Cyclopentadienes and Benzenes

, 2019
The substrate-dependent annulations of δ-acetoxy allenoates with α-hydroxy-β-carbonyl ester derivatives are reported. 2-[(Methoxycarbonyl)­oxy]­malonate as a C1 partner is able to undergo (1 + 4) annulations with allenoates in the presence of a ...
Tong Xu (762586), Dong Wang (73290), Xiaofeng Tong (1490881), Wei Liu (20030)   +3 more
core   +1 more source