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Now showing items 6561-6570 of 7848
Microwave-assisted Palladium catalysed C-H acylation with aldehydes. Synthesis and diversification of 3-acylthiophenes
(Royal Society of Chemistry, 2021-12-22)
The use of MW allows the efficient palladium(II)-catalysed C-3 acylation of thiophenes with aldehydes via C(sp2)-H activation for the synthesis of (cyclo)alkyl/aryl thienyl ketones (43 examples). Compared to standard thermal ...
Palladium-catalysed Heck-type alkenylation reactions in the synthesis of quinolines. Mechanistic insights and recent applications
(Royal Society of Chemistry, 2020-05-18)
Quinoline and quinolone cores are present in a wide variety of pharmaceuticals, agrochemicals and materials, as well in ligands/catalysts in asymmetric synthesis. Transition-metal catalysed based approaches have played a ...
Selective Pd(II)-catalyzed Acylation of Pyrrole with Aldehydes. Application to the Synthesis of Celastramycin analogues and Tolmetin
(Wiley-VCH, 2020-04-27)
The Pd(II)-catalyzed C-2 acylation of pyrrole with aldehydes in the presence of TBHP as oxidant has been studied for the synthesis of di(hetero)aryl ketones. The use of 2-pyrimidine as directing group leads to 2-acylpyrroles ...
COVID-19 first lockdown as a window into language acquisition: associations between caregiver-child activities and vocabulary gains
(2022)
The COVID-19 pandemic, and the resulting closure of daycare centers worldwide, led to unprecedented
changes in children’s learning environments. This period of increased time at home with
caregivers, with limited access ...
Lexical and Prosodic Pitch Modifications in Cantonese Infant-directed Speech
(Journal of Child Language, 2021)
The functions of acoustic-phonetic modifications in infant-directed speech (IDS) remain a
question: do they specifically serve to facilitate language learning via enhanced phonemic
contrasts (the hyperarticulation ...
Depression and Anxiety in the Postnatal Period: An Examination of Infants' Home Language Environment, Vocalizations, and Expressive Language Abilities
(Child Development, 2020)
This longitudinal study investigated the effects of maternal emotional health concerns, on infants' home language environment, vocalization quantity, and expressive language skills. Mothers and their infants (at 6 and 12 ...
Input quality and speech perception development in bilingual infants' first year of life
(WILEY, 2022)
Individual differences in infants’ native phonological development have been
linked to the quantity and quality of infant-directed
speech (IDS). The effects of
parental and infant bilingualism on this relation in 131 ...
Rhythm discrimination and metronome tapping in 4-year-old children at risk for developmental dyslexia
(Cognitive Development, 2021)
Temporally accurate perception and production of rhythmic patterns are key factors related to
language development and reading acquisition. Here we investigate rhythm discrimination and
rhythm production in children who ...
Prosodic cues in infant-directed speech facilitate young children’s conversational turn predictions
(Journal of Experimental Child Psychology, 2020)
Experienced language users are able to predict when conversational
turns approach completion, which allows them to attend
to and comprehend their interlocutor’s speech while planning
and accurately timing their response. ...
Infant‐directed speech to infants at risk for dyslexia: A novel cross‐dyad design
(Wiley, 2020)
When mothers speak to infants at risk for developmental dyslexia, they do not hyperarticulate vowels in their infant‐directed speech (IDS). Here, we used an innovative cross‐dyad design to investigate whether the absence ...