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Efficient stereocontrolled synthesis of (S)-Fmoc-β-nitroalanine via oxidation of oxime

Stereoselective synthesis of (S)-Fmoc-?-nitroalanine was accomplished from (R)-Fmoc-Ser( t Bu)-OH in a total of six steps via oxidation of oxime.Stereocontrolled synthesis of (S)-Fmoc-?-nitroalanine (20) was accomplished from (R)-Fmoc-Ser( t Bu)-OH (14) in a total of six steps via an oxime.

出版机构:Elsevier Science

刊物名称:Tetrahedron Letters

出版时间:2010

ISSN:0040-4039

数据源:报刊文摘

Recent Advances on the Organocatalyzed Enantioselective α-heterofunctionalization of Carbonyl Compounds

Using this straightforward synthetic strategy, a wide range of valuable chiral building blocks such as ?-amino acids, ?-amino alcohols, epoxides, 1,2-diols, ?-sulfenylated, ?-selenenylated and ?

出版机构:Bentham Science Publishers

刊物名称:Current Organic Chemistry

出版时间:2011

ISSN:1385-2728

数据源:报刊文摘

A New Highly Versatile Handle for Chemistry on a Solid Support: The Pipecolic Linker

The design, synthesis, and potential application of the pipecolic linker is presented. This new versatile handle can immobilize primary, secondary, and aromatic amines, as well as alcohols, phenols, and hydrazides, on a solid support.

出版机构:WILEY‐VCH Verlag

刊物名称:Chemistry - A European Journal

出版时间:2010

ISSN:0947-6539

数据源:报刊文摘

A Practical and Efficient Total Synthesis of Potent Insulinotropic (2S,3R,4S)-4-Hydroxyisoleucine through a Chiral N-Protected γ-Keto-α-aminoester

This compact economical and scalable sequence enables to perfectly control three contiguous chiral centers. It does not involve any chromatographic purification, and the desired compound is obtained in >99 % de, >99 % ee, and 22 % overall yield under our optimized conditions.

出版机构:WILEY‐VCH Verlag

刊物名称:European Journal of Organic Chemistry

出版时间:2010

ISSN:1434-193X

数据源:报刊文摘

N-(4-Nitrophenylsulfonyl)- and N-(Fluorenylmethoxycarbonyl)-N-ethyl Amino Acid Methyl Esters - A Practical Approach

n efficient one-pot preparation of N-ethyl-N-4-nitrophenylsulfonyl (nosyl) amino acid methyl esters was accomplished by a simple N-ethylation reaction by using triethyloxonium tetrafluoroborate in the presence of N,N-diisopropylethylamine.

出版机构:WILEY‐VCH Verlag

刊物名称:European Journal of Organic Chemistry

出版时间:2010

ISSN:1434-193X

数据源:报刊文摘

Chiral Phosphanylferrocenecarboxamides with Amino Acid Pendant Groups as Ligands for Cu-Mediated Asymmetric Conjugate Additions of Diethylzinc to Chalcones - Structural Characterisation of Precursors to the Cu Catalyst

eries of chiral phosphanylferrocenecarboxamides was prepared by treatment of either 1'-(diphenylphosphanyl)ferrocene-1-carboxylic acid (Hdpf) or its planar-chiral 1,2-isomers with amino acid methyl esters in the presence of peptide coupling agents.

出版机构:WILEY‐VCH Verlag

刊物名称:European Journal of Organic Chemistry

出版时间:2010

ISSN:1434-193X

数据源:报刊文摘

A stereoselective synthesis of α-deuterium-labelled (S)-α-amino acids

An atom-efficient and stereoselective synthesis has been developed for the preparation of ?-2H-labelled (S)-?-amino acids, starting from a novel chiral diketopiperazine scaffold.

出版机构:Springer Vienna

刊物名称:Amino Acids

出版时间:2010

ISSN:0939-4451

数据源:报刊文摘

Preparation of the β2‐Homoselenocysteine Derivatives Fmoc‐(S)‐β2hSec(PMB)‐OH and Boc‐(S)‐β2hSec(PMB)‐OH for Solution and Solid‐Phase Peptide Synthesis

Fmoc??2hSer(tBu)?OH was converted to Fmoc??2hSec(PMB)?OH in five steps.

出版机构:WILEY‐VCH Verlag

刊物名称:Helvetica Chimica Acta

出版时间:2011

ISSN:0018-019X

数据源:报刊文摘

Precise Positioning of Chiral Building Blocks in Monodisperse, Sequence‐Defined Polyamides

The synthesis of monodisperse polymers with a defined monomer sequence is a new challenge in polymer chemistry. Recently, we introduced a novel synthetic strategy towards monodisperse, sequence?

出版机构:WILEY‐VCH Verlag

刊物名称:Macromolecular Rapid Communications

出版时间:2011

ISSN:1022-1336

数据源:报刊文摘