Template-controlled oligomerization support studies. Template synthesis and functionalization

Feldman, Ken S.; Bobo, John S.; Ensel, Susan M.; Lee, Yoon B.; Weinreb, Paul H.

doi:10.1021/jo00289a019

Cited by 20 publications

(8 citation statements)

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“…Thes ynthesis of the NBD2 monomer was prepared according to literature procedures [14] and was then subjected to inverse vulcanization [15][16][17][18] with liquid sulfur (T = 130-160 8 8C) to afford poly(sulfur-random-NBD2)(poly(S-r-NBD2)), at two different feed ratios (70-wt %S /30-wt % NBD2 &5 0-wt %S /50-wt %N BD2). Copolymerization of these comonomers afforded amorphous,yellow,g lassy crosslinked networks.Structural characterization of these thermosets was done using 13 CC P-MAS solid-state NMR spectroscopy (Figure 3b), which confirmed that the norbornyl skeletal framework remained intact after polymerization, as indicated by the upfield resonances at 44 and 48 ppm from methylene and methine protons from NBD2.…”

Section: Angewandte Chemiementioning

confidence: 99%

Infrared Fingerprint Engineering: A Molecular‐Design Approach to Long‐Wave Infrared Transparency with Polymeric Materials

et al. 2019

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Optical technologies in the long-wave infrared (LWIR) spectrum (7-14 mm) offer important advantages for high-resolution thermal imaging in near or complete darkness. The use of polymeric transmissive materials for IR imaging offers numerous cost and processing advantages but suffers from inferior optical properties in the LWIR spectrum. A major challenge in the design of LWIR-transparent organic materials is that nearly all organic molecules absorb in this spectral windoww hichl ies within the so-called IR-fingerprint region. We report on an ew molecular-design approacht o prepare high refractive index polymers with enhanced LWIR transparency.Computational methods were used to accelerate the design of novel molecules and polymers.U sing this approach,w eh ave prepared chalcogenide hybrid inorganic/ organic polymers (CHIPs) with enhanced LWIR transparency and thermomechanical properties via inverse vulcanization of elemental sulfur with new organic co-monomers.

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Section: Angewandte Chemiementioning

confidence: 99%

Infrared Fingerprint Engineering: A Molecular‐Design Approach to Long‐Wave Infrared Transparency with Polymeric Materials

et al. 2019

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“…N-Acetyl-L-cysteine methyl ester was prepared according to a modified published procedure. 82 Briefly, CH 3 OH (1.6 ml, 39 mmol) and concentrated HCl (180 ll) were added slowly to a solution of N-acetyl-L-cysteine (NAC, 640 mg, 3.9 mmol) in chloroform (9 ml). The reaction mixture was refluxed for 3 h at 66 • C, taken to dryness by rotary evaporation and the product recrystallized from ethyl ether.…”

Section: Synthesis Of N-acetyl-l-cysteine Methyl Estermentioning

confidence: 99%

A simple, convenient method to synthesize cobalamins: synthesis of homocysteinylcobalamin, N-acetylcysteinylcobalamin, 2-N-acetylamino-2-carbomethoxyethanethiolatocobalamin, sulfitocobalamin and nitrocobalamin

et al. 2006

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Glutathionylcobalamin, nitrocobalamin and sulfitocobalamin are important cobalamin metabolites isolable from human tissues. Herein we demonstrate that a procedure used to synthesize and isolate γ-glutamylcysteinylcobalamin and glutathionylcobalamin in aqueous solution in high yield and purity can be used to synthesize other novel, biologically relevant thiolatocobalamins, including D,Lhomocysteinylcobalamin, N-acetyl-L-cysteinylcobalamin (Na + salt) and 2-N-acetylamino-2-carbomethoxy-L-ethanethiolatocobalamin, as well as other non-alkylcobalamins, such as sulfitocobalamin (Na + salt) and nitrocobalamin. This uncomplicated, general procedure will assist researchers in identifying unknown cobalamin metabolites isolated from biological samples, and researchers interested in studying the uptake and intracellular cobalamin processing mechanisms utilizing non-alkylcobalamin derivatives that are not yet commercially available. The X-ray structure and XAS spectrum of N-acetyl-L-cysteinylcobalamin are also presented.

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“…112 This triptycene building block has also found application in several areas of nanotechnology such as in the preparation of metallocene molecular gears, 113 a molecular barrow 114 and a molecular ratchet. 115 Fewer examples exist of the use of 9-substituted anthracene derivatives in natural product syntheses, presumably due to the issues regarding the regioselectivity of the Diels -Alder reaction.…”

Section: Additions To 9-substituted Anthracenementioning

confidence: 99%

Diels–Alder reactions of anthracene, 9-substituted anthracenes and 9,10-disubstituted anthracenes

2003

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Template-controlled oligomerization support studies. Template synthesis and functionalization

Cited by 20 publications

References 0 publications

Infrared Fingerprint Engineering: A Molecular‐Design Approach to Long‐Wave Infrared Transparency with Polymeric Materials

Infrared Fingerprint Engineering: A Molecular‐Design Approach to Long‐Wave Infrared Transparency with Polymeric Materials

A simple, convenient method to synthesize cobalamins: synthesis of homocysteinylcobalamin, N-acetylcysteinylcobalamin, 2-N-acetylamino-2-carbomethoxyethanethiolatocobalamin, sulfitocobalamin and nitrocobalamin

Diels–Alder reactions of anthracene, 9-substituted anthracenes and 9,10-disubstituted anthracenes

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