نتایج جستجو برای: selective alkylation

تعداد نتایج: 203893  

A. Nejad Ebrahimi A. Zolfaghari Sharak F. Aghazadeh S. A. Mousavi

A genetic algorithm is used to optimize the modified benzene alkylation process. Based on the previous studies, the modified process increases ethylbenzene selectivity and decreases energy consumption at the same time. The inlet ethylene flow rate of each alkylation reactor is optimized in order to reduce the chance of transalkylation reactions but increase ethylbenzene selectivity. The byprodu...

Journal: :Synthesis 2021

Abstract We report the application of Pd(II)-catalyzed, directing-group-aided C–H arylation/alkylation tactics to functionalize pyrene core, especially, relatively inaccessible C2 and K-region C10 positions core augmentation library derivatives with C1,C2- C1,C10-disubstituted motifs. The Pd(II)-catalyzed β-C–H C2-position pyrene-1-carboxamide possessing an 8-aminoquinoline directing group yiel...

Journal: :Chinese Journal of Catalysis 2021

Palladium-catalyzed asymmetric allylic alkylation (AAA) of vinyl benzoxazinanones has become an important strategy for the synthesis chiral nitrogen-containing heterocycle compounds. However, linear-selective products rarely been reported. The simultaneous control regio-, E / Z - and enantioselectivities constitutes a major challenge inhibits advancement this chemistry. Herein, we present palla...

Journal: :Cancer research 1986
B Brdar

Alkylating agents, mechlorethamine and N-methyl-N'-nitro-N-nitrosoguanidine, induce the production of plasminogen activator in U-87MG cells, an alkylation DNA repair deficient (Mer-) human glioblastoma strain. Enzyme induction was not observed, however, in U-178MG and SH-101 cells, alkylation repair proficient (Mer+) glioblastoma strains, or in HeLa cells, which reactivated and supported well t...

Journal: :Dalton Transactions 2021

NHC-Pd-PEPPSI-catalyzed α-alkylation of ketones with primary alcohols and tandem Suzuki–Miyaura-coupling/α-alkylation reactions under borrowing hydrogen conditions were reported.

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