Results 41 to 50 of about 156,373 (305)

Carbene-Assisted Arene Ring-Opening

open access: yes
Despite the significant achievements in dearomatization and C–H functionalization of arenes, the arene ring-opening remains a largely unmet challenge and is underdeveloped due to the high bond dissociation energy and strong resonance stabilization energy
Haoran Xu (484184)   +6 more
core   +2 more sources

Ring-opening terpolymerisation of phthalic thioanhydride with carbon dioxide and epoxides

open access: yes, 2023
We report the ring-opening terpolymerisation (ROTERP) of phthalic thioanhydride with CO2 and epoxides forming statistical poly(ester-ran-thioester-ran-carbonates) employing heterobimetallic and bicomponent catalysts.
Alex, Plajer   +2 more
core   +1 more source

Claudin‐6 Protein Expression in Atypical Teratoid/Rhabdoid Tumors Is Strongly Enriched in the Molecular Subgroup AT/RT‐TYR

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Claudin‐6 has emerged as a promising immunotherapeutic target, yet protein‐level data in atypical teratoid/rhabdoid tumors (AT/RTs) have been inconsistent. We analyzed 36 well‐characterized AT/RT samples and found membranous claudin‐6 protein expression in 58% of cases, with striking enrichment in the molecular subgroup AT/RT‐TYR (100%) and ...
Victoria E. Fincke   +4 more
wiley   +1 more source

Mechanical Behavior of Urban Rail Transit Station Structure Based on Existing Shield Tunnel Interval Underground Excavation Construction

open access: yesChengshi guidao jiaotong yanjiu
Objective Cancer Hospital Station on Shenzhen Rail Transit Line 14 adopts a scheme of large-diameter (8.5 m) shield tunnel expansion featuring tunnel-first and station-later.
ZHANG Zhongan   +5 more
doaj   +1 more source

Ring-Opening Metathesis Polymerization from Surfaces

open access: yes, 2016
Ring-Opening Metathesis Polymerization from ...
Robert R. Rossi (3006015)   +4 more
core   +1 more source

Heterogeneity in the Global Practice of Central Nervous System Staging in Pediatric Acute Lymphoblastic Leukemia

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Background Central nervous system (CNS) involvement in childhood acute lymphoblastic leukemia (ALL) is assessed by cell counting and cytomorphology from cerebrospinal fluid (CSF) and is used for treatment stratification worldwide. The ratio of “CNS2” patients in clinical trials ranges from 3% to 40%, with unclear prognostic significance ...
Laura Almási   +14 more
wiley   +1 more source

Novel stereocontrolled syntheses of tashiromine and epitashiromine

open access: yesBeilstein Journal of Organic Chemistry, 2015
A novel stereocontrolled approach has been developed for the syntheses of tashiromine and epitashiromine alkaloids from cyclooctene β-amino acids. The synthetic concept is based on the azetidinone opening of a bicyclic β-lactam, followed by oxidative ...
Loránd Kiss   +2 more
doaj   +1 more source

The Cationic Ring-Opening Polymerization of Tetrahydrofuran with 12-Tungstophosphoric Acid

open access: yesMolecules, 2010
The cationic ring-opening polymerization reaction of tetrahydrofuran at 20 ºC was catalyzed by H3PW12O40·13H2O as solid acid catalyst. The effect of the proportions of acetic anhydride and catalyst, reaction time and support on the polymerization ...
Hassan Al-Shahri   +2 more
doaj   +1 more source

A Diastereoselective Synthetic Approach towards the Synthesis of Berkeleylactone F and Its 4-epi-Derivative

open access: yesSynOpen, 2020
A diastereoselective approach to the synthesis of berkeleylactone F is presented. The synthetic strategy is initiated with commercially available (R)-glycidol, 1,6-heptadiyne, and (R)-(+)-methyl lactate.
Srijana Subba   +2 more
doaj   +1 more source

Additional Factors Affecting the Rate and Mechanism of Ring Opening Reaction [PDF]

open access: yesمجلة التربية والعلم, 2005
The reactions of thiosulphate ion with some bromoalkylamines of structure RR'N-(CH2)n-Br, where n = 2,3,4,5 or 6 and R - R1 - H, methyl, ethyl or isopropyl, were studied kinetically in an aqueous solution at different pH, The kinetic results for these ...
Mahmoud S.Saieed
doaj   +1 more source

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