Results 21 to 30 of about 162,541 (190)
Direct Access to Chiral Piperidines by Enantioselective HAT‐Initiated C(sp3)─H Oxidation
Angewandte Chemie, EarlyView.The direct desymmetrization of piperidines is achieved through manganese‐catalyzed enantioselective α‐C(sp3)─H oxidation with hydrogen peroxide, affording versatile chiral N,O‐acetals in good yields and with high enantio‐ and diastereoselectivity. These intermediates provide access to diverse functionalized piperidines with retention of chirality ...
Sethuraman Muthuramalingam +5 more
wiley +2 more sources
Cobalt‐Catalyzed C─N Bond Formation via Metal‐Hydride Hydrogen Atom Transfer (MHAT)
Angewandte Chemie, EarlyView.Cobalt‐catalyzed metal‐hydride hydrogen atom transfer (Co‐MHAT) converts simple alkenes into C─N bonds under mild, near‐neutral conditions. A shared Co─H‐initiated radical/organocobalt intermediate is channeled into radical trapping, radical‐polar crossover, or radical ligand transfer, unifying hydroamination, hydroazidation, hydroamidation, and remote
Arman Khosravi, Ming‐Yu Ngai
wiley +2 more sources
Angewandte Chemie, EarlyView.Highly electrophilic N‐radical cations enable efficient and selective H‐atom transfer (HAT) of unprotected amines. In this exceedingly practical strategy, simple CuCl catalyzes an interrupted Hofmann–Löffler–Freytag (HLF) reaction to afford δ desaturated amines, aza‐heterocycles, and C─H aminated alkanes without protecting groups.
Pavitra Laohapaisan +6 more
wiley +2 more sources
Pilot study of contact sensitization to rubber allergens and bisphenol A amongst dental students
International Journal of Occupational Medicine and Environmental Health, 2017 Objectives: The aim of this study has been to evaluate the rate of contact sensitization to some rubber allergens and to bisphenol A (BPA) amongst students of dental medicine and dental patients.
Maya Grigorievna Lyapina +6 more
doaj +1 more source
Angewandte Chemie, EarlyView.Driven by sodium dithionite and hydrogen peroxide under mild aqueous conditions, a water‐soluble perylene bisimide undergoes reversible electron‐transfer cycles that generate its emissive excited state without dye decomposition. We define this out‐of‐equilibrium system as chemically fueled regenerative chemiluminescence (CFRCL), opening new avenues for
Luca Morgan +5 more
wiley +2 more sources
Successful treatment of progressive macular hypomelanosis
Dermatology Reports, 2020 Progressive Macular Hypomelanosis (PMH) is a common but often misdiagnosed disorder of acquired hypopigmentation. An adolescent female presented with irregular, hypopigmented patches ultimately diagnosed as PMH.
Nicholas Leonard +2 more
doaj +1 more source
Molecules, 2000 In industry, the bulk free radical polymerization of styrene takes place with the aid of peroxide initiators such as benzoyl peroxide. In this work di- and trimeric cyclic peroxides were used as initiators of the styrene polymerization in order to ...
A. I. Cañizo +3 more
doaj +1 more source
Фармацевтичний журнал, 2021 Among dermatological diseases demodicosis and acne occupy a very important place. The incidence of demodicosis is more than 5% and ranks seventh in frequency among dermatological diseases. It is known that demodicosis can turn into acne.
A. S. Koval
doaj +1 more source
Occupational exposure to benzoyl peroxide [PDF]
"Recommendations for a benzoyl-peroxide (94360) standard relate to the environmental, medical, labeling and posting, personal protection, communication, work practice, sanitation, monitoring, and recordkeeping aspects of safety.
core +1 more source
, 2022 This record was harvested from a previous catalogue system and will be withdrawn in 2025. Information in this record may be superseded or incomplete.
Weickhardt, Leonard W.
core