Application of the [1,2]-Wittig rearrangement and cyclisation approach to 3-arylphthalides has been evaluated for the synthesis of three bioactive natural products. While this is successful in the case of crycolide, providing the second synthesis of this compound, the more sterically demanding targets isopestacin and cryphonectric acid prove not to be amenable to this approach, with the 2,6-disubstituted aryl groups causing the failure of the rearrangement and alkylation steps, respectively. Direct oxidation of the substituted benzhydrols resulting from [1,2]-Wittig rearrangement using MnO provides a new route to 3-aryl-3-hydroxyisoindolinones, and this method has been used in the synthesis of two 3-aryl-3-benzyloxyisoindolinone anticancer agents.
View Article and Find Full Text PDFInt J Pediatr Otorhinolaryngol
September 2021
Background: Children with cleft palate are at high risk of both conductive hearing loss and cleft speech characteristics (CSCs) yet there is limited research to understand whether hearing loss impacts speech development in this population by contributing to the development of CSCs.
Aims: This study used data from a large national cohort study in the UK (The Cleft Collective) to explore the relationship between those with a history of diagnosed hearing loss and presence of CSCs in children with cleft palate (+/- cleft lip) aged between 18 and 24 months.
Method: Speech and Language Therapists (SLTs) provided uniformed information from assessment for 123 participants who had been recruited to the Cleft Collective study.
J Clin Child Adolesc Psychol
September 2012
This study examined relationships between parent-child emotional communication and callous-unemotional (CU) traits and conduct problems. References to negative and positive emotions made by clinic-referred boys (3-9 years) and their parents were coded from direct observations of family interactions involving the discussion of shared emotional experiences. Although frequencies of parents' emotion expression did not generally relate to levels of CU traits, boys higher on CU traits were observed to be more expressive of negative emotions in conversation with their caregivers-specifically for sadness and fear.
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