64030-44-0Relevant academic research and scientific papers
Chiral azo-heterocyclic carbene precursor compound with bicyclic framework and preparation method thereof
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Paragraph 0082; 0083; 0084; 0085; 0090; 0092; 0093, (2019/01/22)
The invention discloses a chiral azo-heterocyclic carbene precursor compound with a bicyclic framework and a preparation method thereof. A series of the chiral azo-heterocyclic carbene precursor compound with the bicyclic framework is obtained by taking c
Modular synthesis of new bicyclic carbene precursors
Li, Jie,Yao, Jiaqi,He, Weiping,Yang, Fan,Liu, Xiaoming
, p. 951 - 954 (2019/11/22)
A series of new N-heterocyclic carbene (NHC) precursors, containing bicyclic pyrrolo[1,2-c]imidazole framework, were prepared from N-(tert-butoxycarbonyl)-L-proline (1-Boc-L-proline). The sequential attachment of nitrogen nucleophiles and subsequent ring
Transfer hydrogenation reactions catalyzed by chiral half-sandwich Ruthenium complexes derived from Proline
Pandia Kumar, Arun Kumar,Samuelson, Ashoka G
, p. 1405 - 1415 (2016/09/19)
Chiral ruthenium half-sandwich complexes were prepared using a chelating diamine made from proline with a phenyl, ethyl, or benzyl group, instead of hydrogen on one of the coordinating arms. Three of these complexes were obtained as single diastereoisomers and their configuration identified by X-ray crystallography. The complexes are recyclable catalysts for the reduction of ketones to chiral alcohols in water. A ruthenium hydride species is identified as the active species by NMR spectroscopy and isotopic labelling experiments. Maximum enantio-selectivity was attained when a phenyl group was directly attached to the primary amine on the diamine ligand derived from proline. [Figure not available: see fulltext.]
Synthesis and characterization of new chiral azolinium salts, precursors to N-heterocyclic carbenes, derived from l-proline
Thomasset, Amélia,Bouchardy, Lucie,Bournaud, Chloée,Guillot, Régis,Toffano, Martial,Vo-Thanh, Giang
, p. 242 - 250 (2014/03/21)
A short and flexible procedure for the preparation of seven chiral azolinium and five functionalized chiral azolinium salts, precursors to N-heterocyclic carbenes, derived from l-proline has been developed. Moderate to good overall yields were obtained. Some NHC dimers and thiones were isolated. X-ray crystal structure determinations of two [Rh-NHC] complexes were also reported.
Chiral amine catalyzed enantio- and diastereoselective Michael reaction in brine
Singh, Sarbjit,Chimni, Swapandeep Singh
, p. 1068 - 1079 (2012/11/06)
Simple pyrrolidine-based chiral amines were synthesized and used for the Michael addition of different ketones to a variety of nitro-olefins in brine. The effect of different surfactants and acids on the yields and stereochemical outcome of the Michael ad
Synthesis and characterization of chiral 1,2-diamines from 5-oxo-pyrrolidine-(S)-2-carboxylic acid
Koehn, Uwe,Schramm, Andrea,Kloss, Florian,Goerls, Helmar,Arnold, Evelyn,Anders, Ernst
, p. 1735 - 1741 (2008/02/11)
Unsymmetrical chiral secondary vicinal diamines were synthesized by applying a modified three-step reaction. The key step in this sequence is a primary amine mediated ring opening reaction of a diastereomeric oxazolidinone derivative. A possible mechanism
Enantiomerically pure cyclopalladated diazaphospholidine
Dunina, Valery V.,Gorunova, Olga N.,Stepanova, Valeriya A.,Zykov, Pavel A.,Livantsov, Michail V.,Grishin, Yuri K.,Churakov, Andrey V.,Kuz'mina, Lyudmila G.
, p. 2011 - 2015 (2008/02/11)
Enantiomerically pure (S)-2-(anilinomethyl)pyrrolidine (S)-2 was obtained from (S)-proline using a modified four-step procedure in a total yield of 56%. Diamine (S)-2 was converted to diazaphospholidine (S)-1 using oTolP(NMe2)2
Conformational arm-wrestling: Battles for stereochemical control in benzamides bearing matched and mismatched chiral 2- and 6-substituents
Clayden, Jonathan,Foricher, Yann J. Y.,Helliwell, Madeleine,Johnson, Paul,Mitjans, David,Vinader, Victoria
, p. 444 - 454 (2008/01/27)
The orientation of a tertiary amide group adjacent to an aromatic ring may be governed by the stereochemistry of an adjacent chiral substituent. With a chiral substituent in both ortho positions, matched/mismatched pairs of isomers result. Evidence for ma
Method for preparing 2-(2-arylmorpholin-2-yl)ethanol derivatives and intermediates
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Page/Page column 39, (2010/11/08)
The invention relates to a process for the preparation of substituted 2-(2-arylmorpholin-2-yl)ethanol derivatives.
Synthesis and application to asymmetric allylic amination of substituted monodonor diazaphospholidine ligands
Edwards, Christopher W.,Shipton, Mark R.,Alcock, Nathaniel W.,Clase, Howard,Wills, Martin
, p. 6473 - 6480 (2007/10/03)
The synthesis of a series of substituted monodonor diazaphospholidine ligands is described. A regioselective lithiation process is a key step in one of these syntheses. The compounds are designed to be incorporated into soluble polymer and other solid pha
