A new method for converting terminal epoxides and primary alcohols into α-alkylated ketones under borrowing hydrogen conditions is reported. The procedure involves a one-pot epoxide ring opening and alkylation via primary alcohols in the presence of an N-heterocyclic carbene iridium(I) catalyst, under aerobic conditions, with water as the side product.
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http://dx.doi.org/10.1021/acs.orglett.1c01765 | DOI Listing |
Am J Drug Alcohol Abuse
January 2025
School of Nursing and Health Sciences, Hong Kong Metropolitan University, Hong Kong, China.
Drug use among men is a significant public health concern in China, with compulsory drug treatment centers being the primary approach. Police officers in these centers play a crucial role in shaping the interactions and experiences of men who use drugs (MWUD). However, little research exists on the attitudes of police officers toward MWUD in China.
View Article and Find Full Text PDFAddiction
January 2025
Department of Psychiatry and Behavioral Sciences, University of Washington, Seattle, WA, USA.
Background And Aims: Primary care systems often screen for unhealthy alcohol use with brief self-report tools such as the 3-item Alcohol Use Disorders Identification Test for consumption (AUDIT-C). There is little research examining whether change in alcohol use measured on the AUDIT-C captures meaningful change in outcomes affected by alcohol use. This study aimed to measure the association between change in AUDIT-C and change in all-cause hospitalization risk, measured in the year after each AUDIT-C.
View Article and Find Full Text PDFACS Omega
January 2025
School of Chemistry, University of Southampton, Southampton SO17 1BJ, United Kingdom.
Seventeen 3-alkylaminoquinoxaline-2(1)-thiones and 3-alkyloxyquinoxaline-2(1)-thiones were prepared by a novel thionation protocol from the readily available quinoxaline-2,3-dione in excellent overall yields. This protocol starts with the chlorination of dione using thionyl chloride to give 2,3-dichloroquinoxaline followed by the reaction with equimolar amounts of -nucleophiles (primary amines and secondary amines) or -nucleophiles (phenols and alcohols) to principally afford 2-alkanamino-3-chloroquinoxalines or 2-alkyloxy-3-chloroquinoxalines, respectively. The chloroquinoxalines reacted with the thionation reagent -cyclohexyl dithiocarbamate cyclohexyl ammonium salt in ethanol under reflux to principally give the corresponding quinoxalin-2-yl cyclohexylcarbamodithioate that finally rearranges to give the corresponding thiones in 76-93% overall yields.
View Article and Find Full Text PDFOrg Biomol Chem
January 2025
Department of Chemistry, Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, P. R. China.
An atmospheric oxygen-mediated oxidative coupling of primary and secondary alcohols for the synthesis of nitrogen-containing heterocycles has been developed. This method utilizes atmospheric oxygen as the sole, environmentally friendly oxidant to convert a variety of alkyl and aromatic primary alcohols into aldehyde equivalents, avoiding over-oxidation to carboxylic acids. Notably, these mild oxidation conditions are compatible with both primary and secondary alkyl alcohols as substrates.
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