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Asymmetric Synthesis of Enantioenriched (+)-Elaeokanine A
The key transformation in the total synthesis of (+)-elaeokanine A was accomplished by asymmetric deprotonation of N-Boc pyrrolidine, followed by the reaction of the in situ... -
Identification of a Boron-Containing Intermediate in the Boron Tribromide Med...
An alternate reaction mechanism for the boron tribromide mediated deprotection of aryl propargyl ethers based on the isolation of a key boron-containing byproduct is proposed.... -
Unusual Transannular Cyclization Products of Sarcophytoxide, a 14-Membered Ma...
Treatment of sarcophytoxide with trimethylsilyl trifluoromethanesulfonate afforded an aromatic ketone as an unusual cyclization product. The modified Mosher's method and X-ray... -
Preparation and unequivocal identification of the regioisomers of nitrocatech...
ABSTRACTThe four positional isomers of nitrocatechol monobenzyl ether were prepared as intermediates to nitrobenzodioxanes directly from 2-benzyloxyphenol or, through two-four... -
Reactions of α,α‘-Dihydroxy Ketones with Phosgene. Structural Requirements fo...
α,α‘-Dihydroxy ketones having two OH groups that can come into close proximity react with phosgene in the presence of DMAP to produce 1,3-dioxane-2,5-diones. When covalent... -
dedup_wf_001--a5872e4a60793df7a1620d00ba7b863c
This work reports the first investigation on the physical vapor deposition of thin films of tin sulfide doped lead sulfide (SnS:PbS). In-situ synthesis route using... -
Solid-Phase Synthesis of Bis-2-imidazolidinethiones from Resin-Bound Tripeptides
The exhaustive reduction of resin-bound tripeptides with borane afforded three secondary amines and one primary amine. The treatment of the solid-support polyamines with... -
Natural products such as adhesives in oil paintings
The study and analysis of the materials employed in artistic paintings provide deeper knowledge about the history of the work of art, including restoration efforts made in the... -
Profilin 2 promotes migration, invasion, and stemness of HT29 human colorecta...
We investigated the role of profilin 2 in the stemness, migration, and invasion of HT29 cancer stem cells (CSCs). Increased and decreased levels of profilin 2 significantly... -
Bent Ladder-Type Hexaphenylene with Carbazole Core and Spiro Linkage as Stabl...
A bent ladder-type hexaphenylene with a carbazole core and spiro-linkage is designed and synthesized by using the ortho-linked spirobifluorene. The design eliminates the... -
A Most Convenient and Atom-Economic Preparation of a Highly Active Ring-Closi...
A new olefin metathesis catalyst has been prepared in situ by a one-step method utilizing an easy-to-prepare organic precursor and only 1 equiv of tricyclohexylphosphine ligand... -
Application of Stereoselective Ether Transfer to the Synthesis of Isotactic P...
An efficient, convergent synthetic strategy has been developed which enables the synthesis of a series of naturally occurring isotactic polymethoxy compounds. Ether transfer... -
Carbon Nanotube Salts. Arylation of Single-Wall Carbon Nanotubes
Carbon nanotube salts prepared by treating single-wall carbon nanotubes (SWNTs) with lithium in liquid ammonia react readily with aryl iodides to give SWNTs functionalized by... -
Reductive Cleavage of N−O Bonds Using Samarium(II) Iodide in a Traceless Rele...
A strategy for making amides and ureas using a polymer-supported hydroxylamine resin as a traceless linker is described. The cleavage of the linker by samarium(II) iodide is... -
Counterattack Mode Differential Acetylative Deprotection of Phenylmethyl Ethe...
A counterattack protocol for differential acetylative cleavage of phenylmethyl ether has been developed. The phenylmethyl moiety is liberated as benzyl bromide that is isolated... -
Studies toward the Total Synthesis of Axinellamine and Massadine
Intramolecular Diels−Alder reactions of several N−O linked 4-vinylimidazole dimers provide the expected adduct in moderate to good yield as a single, all trans stereoisomer,... -
Supramolecular Device for Artificial Photosynthetic Mimics As Helix-Mediated ...
We have developed a novel integrated supramolecular device for a photosynthetic antenna/reaction center (RC) model based on a helical amylose, which plays an important role as... -
Transesterification and Mechanical Properties of Blends of a Model Thermotrop...
Transesterification between a model thermotropic polyester (TTP) and polycarbonate (PC) was investigated during melt blending in a twin-screw mini-compounder at temperatures... -
Theoretical Studies on Graphyne Substructures: Geometry, Aromaticity, and El...
The geometries of multiply fused dehydrobenzo[12]annulenes [12]DBAs 2−7 with various topologies, which are considered as graphyne fragments, have been optimized at the... -
New Procedure to Mask the 2,3-π Bond of the Indole Nucleus and Its Applicatio...
Treatment of indole alkaloids with hypervalent iodine in the presence of ethylene glycol provides 2,3-ethylene glycol bridged adducts that could be converted into the original...
