64030-44-0Relevant academic research and scientific papers
Chiral azo-heterocyclic carbene precursor compound with bicyclic framework and preparation method thereof
-
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
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
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
Method for preparing 2-(2-arylmorpholin-2-yl)ethanol derivatives and intermediates
-
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.
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
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
