Results 31 to 40 of about 4,110,263 (408)

Unanticipated switch of reactivity of isonitrile via N≡C bond scission: Cascade formation of symmetrical sulfonyl guanidine

open access: yesiScience, 2023
Summary: Unanticipated formation of symmetrical sulfonyl guanidine was observed while treating isonitriles with N,N-dibromoarylsulfonamides in absence of an external amine source.
Debashish Mishra   +2 more
doaj  

Copper-catalyzed oxidative dehydrogenative dearomatization of indole derivatives: A new strategy to construct spirocyclic indolenines

open access: yesiScience, 2022
Summary: A concise copper-catalyzed oxidative dehydrogenative dearomatization of indole derivatives for the direct synthesis of spirocyclic indolenines containing fluorene and indeno[2,1-b]indole groups has been established.
Junli Chao   +6 more
doaj  

The The perceptions of Senior High School students and teachers about organic chemistry: A Ghanaian perspective

open access: yesScience Education International, 2021
The purpose of the study was to determine the perceptions that senior high school (SHS) chemistry students and teachers have about organic chemistry as well as to compare organic chemistry topics that are difficult for students and teachers.
Esther Nartey , Ruby Hanson
doaj   +1 more source

The Effects of Prior Calculus Classes on Success in Organic Chemistry [PDF]

open access: yes, 2023
Within University of Nebraska – Omaha (UNO) chemistry-based degree programs, organic chemistry along with at least two semesters of calculus are required courses.
Williamson, Tori
core   +1 more source

Copper-mediated aerobic trifluoromethyltelluration of boronic acids with [Me4N][TeCF3]

open access: yesiScience, 2022
Summary: A copper-mediated trifluoromethyltelluration of arylboronic acids with [Me4N][TeCF3] using air as an environmental friendly oxidant is presented. The reaction proceeded smoothly under mild conditions in the presence of Cu(OTf)2 and bipyridine to
Jing-Yan Dong   +3 more
doaj  

Catalytic Enantiodivergent Michael Addition by Subtle Adjustment of Achiral Amino Moiety of Dipeptide Phosphines

open access: yesiScience, 2020
Summary: Over the past decades, asymmetric catalysis has been intensely investigated as a powerful tool for the preparation of numerous chiral biologically active compounds.
Huamin Wang   +3 more
doaj  

The differential perceptions of selected Ghanaian Senior High School (SHS) students and teachers about organic chemistry [PDF]

open access: yes, 2021
The purpose of the study was to determine the perceptions that senior high school chemistry students and teachers have about organic chemistry as well as to compare organic chemistry topics that are difficult for students and teachers.
Hanson, Ruby, Nartey, Esther
core   +1 more source

FACTORS INFLUENCING HIGH SCHOOL CHEMISTRY TEACHERS’ AND STUDENTS’ TEACHING AND LEARNING OF ORGANIC QUALITATIVE ANALYSIS: A QUALITATIVE STUDY [PDF]

open access: yes, 2022
Identification and characterisation of the structures of unknown substances are important parts of learning organic chemistry. This paper reports on a study that investigated factors that influence the teaching and learning of organic qualitative ...
Adu-Gyamfi, Kenneth   +1 more
core   +2 more sources

Selective Quadruple C(sp3)-F Functionalization of Polyfluoroalkyl Ketones

open access: yesiScience, 2020
Summary: The significance of organofluorine compounds has inspired the establishment of numerous methods for the functionalization of rather inert C-F bonds.
Ting Xie   +7 more
doaj  

Further developments of β,γ-unsaturated α-ketoesters as versatile synthons in asymmetric catalysis

open access: yesiScience, 2022
Summary: β,γ-Unsaturated α-ketoesters prove to be versatile organic synthons participating in diverse catalytic asymmetric transformations with the breathtaking development of organo-catalysis, new catalytic systems including ingenious chiral ligands as ...
Ruixian Deng   +4 more
doaj  

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