107751-31-5

Upstream product

• 38430-55-6 ethyl-4-acetylbenzoate 
• 6287-86-1 p-ethoxycarbonylbenzaldehyde 
• 2747-38-8 methyltrichlorotitanium 
• 619-64-7 p-ethylbenzoic acid 
• 905955-68-2 ethyl 4-(1,2-epoxyethyl)benzoate 
• 36207-13-3 ethyl ester of para-ethylbenzoic acid 
• 159405-15-9 (R)-[1-(methylsulfonyl)ethyl]-4-benzoic acid ethyl ester 
• 128310-70-3 (R)-1-hydroxyethyl-4-benzoic acid ethyl ester 

Downstream Products

• 150501-70-5 Ethyl 4-<1-(tert-butyldimethylsiloxy)ethyl>benzoate 
• 150501-75-0 4-<1-(tert-Butyldimethylsiloxy)ethyl>-1-<(triisopropylsiloxy)methyl>benzene 
• 150501-77-2 4-<1-(tert-Butyldimethylsiloxy)ethyl>-1-(hydroxymethyl)benzene 
• 80463-22-5 4-(1-hydroxyethyl)benzyl alcohol 

Relevant academic research and scientific papers

Novel iodine reagent system for regioselective cleavage of epoxides to alcohols

Epoxides are converted regioselectively to corresponding higher substituted alcohols with greater yields using diphosphorus tetraiodide (P 2I4) as a reducing agent and a catalytic amount of tetraethylammonium bromide at room temperature. Copyright Taylor & Francis Group, LLC.

Ruthenium-p-cymene Complex Side-Wall Covalently Bonded to Carbon Nanotubes as Efficient Hybrid Transfer Hydrogenation Catalyst

A half-sandwich ruthenium-p-cymene organometallic complex has been immobilized at Single Walled Carbon Nanotubes (SWNT) sidewalls through a stepwise covalent chemistry protocol. The introduction of amino groups by means of diazonium-chemistry protocols leads the grafting at the outer walls of the nanotubes. This hybrid material is active in the transfer hydrogenation of ketones to yield alcohols, using as hydrogen source 2-propanol. SWNT?NH2?Ru presents a broad scope, performing the reaction under aerobic conditions and can be recycled over 9 consecutive reaction runs without losing activity or leaching ruthenium out. Comparison of the activity with related homogeneous catalysts reveals an improved performance due to the covalent bond between the metal and the material, achieving turnover frequencies as high as 192774 h?1.

New Zinc Catalyst for Hydrosilylation of Carbonyl Compounds

A new zinc complex was synthesized and applied in the catalytic hydrosilylation of carbonyl compounds. Optimization of the reaction conditions showed that the presence a substoichiometric amount of methanol accelerates the process significantly. The reaction can proceed at very low catalyst load (down to 0.1 molpercent) under mild reaction conditions. The reaction tolerates the presence of C=C bonds, and thus can be useful for the synthesis of allylic alcohols from α,β-unsaturated aldehydes and ketones.

“Inverse” Frustrated Lewis Pairs: An Inverse FLP Approach to the Catalytic Metal Free Hydrogenation of Ketones

For the first time have boron-containing weak Lewis acids been demonstrated to be active components of Frustrated Lewis Pair (FLP) catalysts in the hydrogenation of ketones to alcohols. Combining the organosuperbase (pyrr)3P=NtBu with the Lewis acid 9-(4-CF3-C6H4)-BBN generated an “inverse” FLP catalyst capable of hydrogenating a range of aliphatic and aromatic ketones including N-, O- and S-functionalized substrates and bio-mass derived ethyl levulinate. Initial computational and experimental studies indicate the mechanism of catalytic hydrogenation with “inverse” FLPs to be different from conventional FLP catalysts that contain strong Lewis acids such as B(C6F5)3.

Chemoselective reduction of aldehydes and ketones by potassium diisobutyl-t-butoxy aluminum hydride (PDBBA)

t-Butoxy derivatives of DIBALH [lithium diisobutyl-t-butoxyaluminum hydride (LDBBA), sodium diisobutyl-t-butoxyaluminum hydride (SDBBA), and potassium diisobutyl-t-butoxyaluminum hydride (PDBBA)] were examined as chemoselective reducing agents of carbonyl compounds. Among them, PDBBA was found to be the most efficient for the reduction of aldehydes and ketones to the corresponding alcohols in the presence of ester, amide, and nitrile substituents at ambient temperature. In addition, the optimal conditions gave higher chemoselectivity for aldehydes in the presence of ketones.

Reactions of a novel modified Red-Al reducing agent with selected organic compounds containing representative functional groups and chemoselective reduction

A new modified Red-Al reagent prepared from commercially available 1,1,1,3,3,3-hexamethyldisilazane and sodium bis(2-methoxyethoxy)aluminumhydride (Red-Al) is reported for the selective reduction of carbonyl compounds containing representative functional groups. Moreover, this novel reagent is superior for the chemoselective reduction of aldehydes and ketones to the corresponding alcohols in excellent yields under mild reaction conditions. Moreover, aldehydes can be reduced selectively in the presence of ketones with similar reactivity.

The remarkable solvent effect on Zn(OAc)2-Catalyzed Hydrosilylation of ketones

The combination of Zn(OAc)2 and N,N-dimethylformamide was found to effectively hydrosilylate various ketones at room temperature. Furthermore, our protocol allows the chemoselective reduction of a formyl group in the presence of a ketone group.

GLUCAGON RECEPTOR ANTAGONISTS

The present invention relates to compounds of Formula I that generally bind to the glucagon receptor and act as glucagon receptor antagonists or inverse agonists. The compounds can be used to treating, preventing, or ameliorating one or more symptoms of a

Acyl Transfer as a Problematic Side Reaction in Polymer-Supported Oligosaccharide Synthesis

Under a wide variety of glycosylation conditions acyl transfer to the polymer support competed with glycoside formation, including the pivaloyl protecting group. As well as acyl transfer, many glycosylations also led to the formation of polymer-bound β-1,2-linked oligomers of the donor. Using ethyl 2,6-di-O-pivaloyl-3,4-O-isopropylidene-β-D-galactothiopyranoside as donor under promotion of N-iodosuccinimide/silver trifluoromethanesulfonate in the presence of 2-methyl-2-butene, an 82% yield of glycoside was obtained along with pivaloylated polymer. Subsequent work showed that increasing the steric bulk about the alcoholic acceptor in conjunction with this 2-O-pivaloyl-protected glycosyl donor completely suppresses this side reaction, giving a nearly quantitative yield of glycoside. This contraintuitive approach of decreasing the reactivity of both the donor and the acceptor to minimize a side reaction is rationalized by assuming that the barrier to acyl transfer is more sensitive to the protecting groups than that of glycosylation. These developments led to a polymer-supported synthesis of the branch point trisaccharide of the group B type 1A Streptococcus capsular polysaccharide.