Results 51 to 60 of about 48,553 (267)

Control of Helix Screw‐Sense Preference in Dynamic Foldamers of meso Symmetry Built From Chiral Monomeric Units

open access: yesAngewandte Chemie, EarlyView.
Sequence‐diverse meso and “near‐meso” oligourea foldamers are reported and exhibit stimulus‐responsive helix screw‐sense control governed by terminal‐group desymmetrization and sequence‐encoded helix stability. ABSTRACT Meso oligoureas are dynamic hydrogen‐bonded foldamers capable of reversible helix polarity inversion but have so far been limited to ...
Naveen Gupta   +13 more
wiley   +2 more sources

A New Series of Bis (Thiosemicarbazone) Derivatives: Synthesis, Spectroscopic Characterization, and Antioxidant Activities

open access: yesSakarya Üniversitesi Fen Bilimleri Enstitüsü Dergisi
New bis (thiosemicarbazone) derivatives (1-5) were obtained from thiophene-2,5-dicarbaldehyde and numerous thiosemicarbazides. The thiosemicarbazides were prepared various isothiocyanates and hydrazine monohydrate.
Halit Muğlu, Hasan Yakan
doaj   +1 more source

The preparation of new functionalized [2.2]paracyclophane derivatives with N-containing functional groups

open access: yesBeilstein Journal of Organic Chemistry, 2015
The two isomeric bis(isocyanates) 4,12- and 4,16-di-isocyanato[2.2]paracyclophane, 16 and 28, have been prepared from their corresponding diacids by simple routes.
Henning Hopf   +2 more
doaj   +1 more source

Blocked isocyanates: from analytical and experimental considerations to non-polyurethane applications

open access: yes, 2016
In this review we aim to provide an introductory guide to blocked isocyanates, through discussion on different examples of blocking groups, along with experimental considerations for their application.
Marianne S. Rolph   +3 more
semanticscholar   +1 more source

Investigations of the Evolved Molecular Basis for Terpenoid Biosynthesis in Marine Sponges

open access: yesAdvanced Science, EarlyView.
Confirming and extending a previous observation in another Bubarida sponge, genomic and functional analyses of A. cavernosa reveal that sponges retain the mevalonate pathway and employ single α‐domain T1TSs and UbiA‐type TSs for terpenoid biosynthesis. The absence of T1TSs clustering with other biosynthetic genes tentatively suggests, based on limited ...
Fangyan Chen   +6 more
wiley   +1 more source

The role of isocyanates in fire toxicity

open access: yes, 2016
Isocyanates are a group of low molecular weight, highly reactive compounds with a functional isocyanate group. The main human exposure route is via inhalation of airborne isocyanates, although dermal exposure has also been reported.
Linda Bengtström, M. Salden, A. Stec
semanticscholar   +1 more source

Isosorbide‐Based Optically Clear Adhesives With Ultrahigh Transparency and Rapid Strain Recovery for Flexible Displays

open access: yesAdvanced Science, EarlyView.
Biomass‐derived isosorbide‐based PUDA crosslinker enables optically clear adhesives with ultrahigh transparency (99.8%), rapid strain recovery, and stable adhesion for flexible displays. ABSTRACT Flexible and foldable displays require optically clear adhesives (OCAs) that combine ultrahigh optical transparency with mechanical resilience under repeated ...
Yoonji Choi   +8 more
wiley   +1 more source

New Reactivity of Masked Isocyanates with Organometallic Reagents [PDF]

open access: yes
The research presented in this thesis centers around the stoichiometric addition of organometallic reagents, particularly Grignard reagents, to heteroatom-substituted isocyanates to provide access to hydroxamates and hydrazides via C-C bond forming ...
Mohamed, Alshimaa Mohamed Ahmed
core   +1 more source

Stability of Isocyanates Sampled in Fire Smokes [PDF]

open access: yes, 2018
Inhalation of airborne isocyanates is associated with acute asthma attacks and inflammation in the respiratory tract as well as cancer. These highly reactive compounds are used as monomers in various applications such as foams for insulation materials ...
Salden, Mariëlle   +5 more
core   +1 more source

Isocyanate‐Modified Melatplatin(IV) Enhances Antitumor Efficacy via TCF4/COL6A3‐Mediated Extracellular Matrix Remodeling and cGAS‐STING Pathway Activation in Bladder Cancer

open access: yesAdvanced Science, EarlyView.
A series of melatonin‐conjugated platinum(IV) prodrugs was functionalized with isocyanate chains (compounds 5‒12). MP‐12C (compound 11) was identified as the lead candidate, with optimal potency and safety. MP‐12C exhibited greater efficacy than cisplatin by increasing intracellular uptake, reshaping the extracellular matrix, activating the cGAS‐STING ...
Linhui Wang   +18 more
wiley   +1 more source

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