Additionally, the Krische allylation avoids the use of preformed allyl metal reagents or metallic reductants and chiral auxiliaries, significantly reducing waste generation. (wikipedia.org)
Water-soluble poly(4-sytrenesulfonic acid-comaleic acid) stabilized ruthenium(0) and palladium(0) nanoclustres as highly active catalyst in hydrogen generation from the hydrolysis of ammonia-borane. (gtu.edu.tr)
Compounds2
Electrophilic addition to chiral alkene containing compounds: Houk-type model for control of reaction stereochemistry, including steric, and chelation factors, including the reaction of chiral allyl silanes. (warwick.ac.uk)
At the same time, we are experienced in multi-step synthesis, heterocyclic compounds, chiral compounds, sugar compounds.We place the highest value on the enduring nature of our customer relationships, the quality of our products and services and the continuity and integrity of our people.Our company is engaged in the production and custom synthesis of intermediates such as APIs and special chemicals. (nbinno.com)
Synthesis6
Asymmetric synthesis of α-chiral hydroxyalkylphosphines via a catalytic, enantioselective reduction of acylphosphines. (lookchem.com)
Sehoon Park and Sukbok Chang report a borane-catalyzed synthesis of silicon-functionalized synthetic intermediates. (thieme.de)
Synthesis of chiral group-14-bridged [1]FCPs were attempted by salt-metathesis reaction of 121 with tBuSnCl2 and Me2SiCl2. (usask.ca)
[email protected] �Departmentof Chemistry, Scripps Florida, Jupiter, Florida 33458 of Chemistry and Biochemistry, Brigham Young University, Provo, UtahAbstractAn enantio- and diastereoselective synthesis of syn-hydroxy-vinyl carboxylate esters 3 by means of the reductive aldol reaction of ethyl allenecarboxylate (2) with 10-trimethylsilyl-9borabicyclo[3.three.2]decane (1R, Soderquist's borane) has been created. (axlinhibitor.com)
Cyclotriphosphazene derivatives with three different chiral centres: Synthesis, characterization and investigation of their stereogenic properties. (gtu.edu.tr)
The Collins Lab employs a number of whole-cell-based systems for the production of chiral building blocks used in the chemoenzymatic synthesis of natural products and functionalized organic materials. (whitman.edu)
Catalysts1
https://doi.org/10.1039/D1CC01579F]] #ref(Takaoka_CC2021.png,center,31%) -Asymmetric O-to-C Aryloxycarbonyl Migration of Indolyl Carbonates Using Single-handed Dynamic Helical Polyquinoxalines Bearing 4-Aminopyridyl Groups as Chiral Nucleophilic Catalysts --Takeshi Yamamoto, Takuya Takahashi, Ryo Murakami, Naoto Ariki, Michinori Suginome --'''Bull. (kyoto-u.ac.jp)
Ligands1
The main advantages of organocatalyzed stereoselective reactions include mild reaction conditions and the use of a sole catalyst without the need of other chiral ligands [4,5] . (beilstein-journals.org)
Complexes1
Escherichia coli cells harboring wild-type cytochrome c from R. marinus (Rma cyt c) were found to form carbon-boron bonds in the presence of borane-Lewis base complexes, through carbene insertion into boron-hydrogen bonds. (chemistryviews.org)
Hydroboration2
Density functional theory calculations recommend that the allene hydroboration involves the 1,4-reduction of two using the chiral borane 1R, leading directly to dienolborinate Z-(O)-8a. (axlinhibitor.com)
Hydroboration involves addition of borane (BH 3 ) followed by oxidation of the intermediate organoborane with alkaline H 2 O 2 . (openstax.org)
Boron3
In 1991, Yamamoto disclosed the first catalytic enantioselective method for carbonyl allylation, which employed a chiral boron Lewis acid-catalyst in combination with allyltrimethylsilane. (wikipedia.org)
His research explores molecules built from clusters of boron atoms, known as boranes, and clusters that contain a mix of boron and carbon, known as carboranes. (whitman.edu)
His Medicinal chemistry research includes themes of Boron, Pincer movement, Pincer ligand and Borane. (research.com)
Planar chiral1
Adding two more synthetic steps, amino groups were replaced with methyl groups which resulted in the planar-chiral (Sp,Sp)-1,1′-dibromo-2,2´-di(isopropyl)ferrocene (120). (usask.ca)
Reactions4
While salt-metathesis reactions with Et2NBCl2 were very selective toward [1]FCPs, employing the amino(dichloro)boranes iPr2NBCl2 and tBu(Me3Si)NBCl2 resulted in formation of significant amounts of bis(boryl)ferrocenes as byproducts. (usask.ca)
Each enantiomers of syn-hydroxy-vinyl imides five is usually obtained by using enantioselective aldol reactions of chiral crotonate imides (Figure 1). (axlinhibitor.com)
Many reactions give chiral products. (openstax.org)
In these reactions, stereoinduction in the products is achieved by the chiral environment present in the catalyst itself. (beilstein-journals.org)
Catalyst3
Convenient catalyst for the enantioselective borane reduction of ketones at ambient temperatures. (lookchem.com)
Directed evolution of Rma cyt c in the bacterial catalyst provided access to 16 new chiral organoboranes [4]. (chemistryviews.org)
These Ni NPs are an active catalyst for the hydrolysis of the ammonia-borane (AB, H3N center dot BH3) complex under ambient conditions and their activities are dependent on the chemical nature of the oxide support that they were deposited on. (metu.edu.tr)
Catalysis2
Herein we report an asymmetric two-component alkenyl Catellani reaction for the construction of C-N axial chirality through a pal-ladium/chiral norbornene cooperative catalysis and an axial-to-axial chirality transfer process. (authorea.com)
The provision of new types of cations that contain both functional and chiral information is a major syn-thetic challenge and can open up new horizons in asymmetric cation-directed Lewis acid catalysis. (uni-regensburg.de)
Stereogenic3
Additionally, by using alcohol reactants, the use of chiral α-stereogenic aldehydes, which are prone to racemization, can be avoided. (wikipedia.org)
This process proceeds with preservation of the chiral information at the stereogenic silicon atom. (uni-regensburg.de)
The investigation of stereogenic properties of cyclotriphosphazene derivatives with two different chiral centres. (gtu.edu.tr)
Intermediates2
With the collaborative efforts of the Viwit team, Viwit Pharmaceutical has evolved from developing chiral borane products to making drug intermediates, active pharmaceutical ingredients and biopharmaceutical products. (viwit.com)
Chiral Quest Corp. develops routes for complex intermediates and APIs and manages tech transfer to full-scale manufacturing. (chembuyersguide.com)
Reaction2
A systematic study was performed, which resulted in increasing the reaction temperature and controlling the rate of addition of the amino(dichloro)boranes to increase the yield of desired [1]FCPs. (usask.ca)
the reaction afforded the chiral-tetrasubstituted 3-amino-2-oxindoles with excellent enantioselectivity of greater than 99% ee and quantitative yields. (metu.edu.tr)
Reagent2
In 1978, Hoffmann reported the first asymmetric carbonyl allylation using a chiral allylmetal reagent, an allylborane derived from camphor. (wikipedia.org)
In Press''' [#xf5c18aa] *2023 [#fee7de97] -A Traceless Chiral Shift Reagent Based on Nonbonding Interaction with Single-Handed Helical Poly(quinoxaline-2,3-diyl) --Takaya Fujie, Takeshi Yamamoto, Michinori Suginome --'''Angew. (kyoto-u.ac.jp)
Chromatography1
The solvent was then evaporated and the residue was purified by flash column chromatography to give the corresponding hydrogenation product which was analyzed by chiral HPLC to determine the enantiomeric excesses. (ambeed.com)
Amino1
A group of amino(dichloro)boranes with different substitutions [Et2NBCl2, iPr2NBCl2, and tBu(Me3Si)NBCl2] were reacted with 121 and its 3-pentyl substituted analog [(Sp,Sp)-1,1′-dilithio-2,2′-di(3-pentyl)ferrocene] (131). (usask.ca)
Reduction1
Monodisperse Ni nanoparticles (NPs) have been synthesized by the reduction of nickel(II) acetylacetonate with the borane-tributylamine complex in a mixture of oleylamine and oleic acid. (metu.edu.tr)
Hydrogen1
lt;p>The potential of two chiral amidines and three non-chiral boranes in the metal-free hydrogen activation was explored. (uni-paderborn.de)
Groups1
A group of chiral phosphorus-bridged [1]FCPs (142, 143 and 144) with different groups in the bridging position (Ph, iPr, and tBu) were prepared by reacting 121 with the respective phosphorus dihalides. (usask.ca)
Supplier2
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