Asymmetric Allylation (asymmetric + allylation)

Distribution by Scientific Domains
Distribution within Chemistry


Selected Abstracts


Highly Selective Preparation of a Chiral Quaternary Allyl Aryl Piperidinedione by Palladium-Catalyzed Asymmetric Allylation Under Solid,Liquid Phase-Transfer Catalysis

EUROPEAN JOURNAL OF ORGANIC CHEMISTRY, Issue 36 2007
Audrey Nowicki
Abstract The combination of a chiral palladium catalyst and a solid,liquid phase-transfer catalyst provides an effective method for the chemo- and enantioselective preparation of the chiral quaternary center of an allyl aryl piperidinedione. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007) [source]


Indium(I)-Catalyzed Asymmetric Allylation, Crotylation, and ,-Chloroallylation of Hydrazones with Rare Constitutional and High Configurational Selectivities,

ANGEWANDTE CHEMIE, Issue 10 2010
Ananya Chakrabarti Dr.
Tolerabel: Bei der ersten asymmetrischen Indium(I)-Katalyse erwies sich ein System aus InI und einem chiralen Semicorrin-Liganden (L*) als wirkungsvoller Katalysator für die enantioselektive Allylierung, Crotylierung und ,-Chlorallylierung von Hydrazonen. In den beiden zuletzt genannten Fällen verläuft die C-C-Verknüpfung hoch selektiv, ohne dass die reaktiven O-H- bzw. C-Cl-Bindungen angegriffen werden. pin=Pinakol. [source]


ChemInform Abstract: From Allylic Alcohols to Chiral Tertiary Homoallylic Alcohol: Palladium-Catalyzed Asymmetric Allylation of Isatins.

CHEMINFORM, Issue 46 2009
Xiang-Chen Qiao
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]


ChemInform Abstract: Asymmetric Allylation of Methyl Ketones by Using Chiral Phenyl Carbinols.

CHEMINFORM, Issue 41 2009
Lutz F. Tietze
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]


A Structurally Simple L-Proline Derivative Promotes the Asymmetric Allylation of Aldehydes with Tribromoallyltin.

CHEMINFORM, Issue 35 2007
Ling-yan Liu
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF. [source]


Chiral Phosphine Oxide BINAPO as a Lewis Base Catalyst for Asymmetric Allylation and Aldol Reaction of Trichlorosilyl Compounds.

CHEMINFORM, Issue 32 2007
Shunsuke Kotani
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF. [source]


Asymmetric Allylation of Aldimines with Indium and (+)-Cinchonine.

CHEMINFORM, Issue 47 2005
Rongbi Han
Abstract For Abstract see ChemInform Abstract in Full Text. [source]


Synthesis and Application of Chiral Spiro Phospholane Ligand in Pd-Catalyzed Asymmetric Allylation of Aldehydes with Allylic Alcohols.

CHEMINFORM, Issue 43 2005
Shou-Fei Zhu
Abstract For Abstract see ChemInform Abstract in Full Text. [source]


Ferrocenylphosphine-Amide Ligands for Palladium-Catalyzed Asymmetric Allylation.

CHEMINFORM, Issue 49 2004
Neil W. Boaz
Abstract For Abstract see ChemInform Abstract in Full Text. [source]


ChemInform Abstract: Pd-Catalyzed Asymmetric Allylation with a Novel C2 -Symmetric Bisphosphinite Ligand: 3R,3,R-Bis (diphenylphosphinoxy)-6,6,6,,6,-tetramethyl-2S,2,S-di-4H-pyran.

CHEMINFORM, Issue 4 2002
Ruzhou Zhang
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]


Asymmetric Allylation of Methyl Ketones by Using Chiral Phenyl Carbinols

CHEMISTRY - A EUROPEAN JOURNAL, Issue 25 2009

Abstract To methyl or to alkyl? High induced facial selectivities and excellent yields are obtained in the allylation of aliphatic methyl ketones by using a structurally simple phenylbenzyl auxiliary to give the corresponding homoallylic ethers (see scheme). The transferred auxiliary has a very good protecting quality and can easily be removed. Novel chiral auxiliaries for the stereoselective allylation of aliphatic methyl ketones with allyltrimethylsilane and their use in the synthesis of homoallylic ethers are described. In a multicomponent domino process catalyzed by trifluoromethanesulfonic acid, the allyl moiety and the auxiliary are transferred onto the substrate to yield tertiary homoallylic ethers. The most useful auxiliary for a general application turned out to be the trimethylsilyl ether of phenyl benzyl carbinol with an induced diastereoselectivity of 90:10 using ethyl methyl ketone and 94:6 using isopropyl methyl ketone as substrates. The transferred substituted benzyl moiety has good protecting properties in subsequent transformations and can easily be removed under reductive conditions to provide the corresponding homoallylic alcohol. The origin of the high selectivity could be elucidated by identifying the relevant transition states using quantum-chemical calculations. An excellent agreement between calculated and experimentally observed selectivities was obtained assuming an oxocarbenium ion as intermediate. [source]


Stereoselective Total Synthesis of Xestodecalactone C

HELVETICA CHIMICA ACTA, Issue 9 2009
Karuturi Rajesh
Abstract A simple and highly efficient stereoselective total synthesis of xestodecalactone C (IIb), a polyketide natural product, was achieved (Scheme,2). The synthesis involved Keck's asymmetric allylation, a iodine-induced electrophilic cyclization, and an intramolecular Friedel,Crafts acylation as key steps. [source]


Simple and Fast Synthesis of New Axially Chiral Bipyridine N,N, -Dioxides for Highly Enantioselective Allylation of Aldehydes

ADVANCED SYNTHESIS & CATALYSIS (PREVIOUSLY: JOURNAL FUER PRAKTISCHE CHEMIE), Issue 9 2009
Aneta Kadl, íková
Abstract Unsymmetrically 3,3,-substituted axially chiral bis(tetrahydroisoquinoline) N,N,- dioxides can be prepared in just three steps. They exhibit unique catalytic activity (turnover frequency, enantioselectivity, substrate scope) in the asymmetric allylation of aromatic aldehydes (up to 96% ee). The product of the enantioselective allylation of benzaldehyde served as a building block for the preparation of an intermediate useful in the enantioselective synthesis of diospongines. [source]