Results 61 to 70 of about 26,606 (255)

Dual Nickel/Photoredox‐Catalyzed Regio‐ and Enantioselective Alkenylation of Epoxides

Advanced Science, EarlyView.
Ni/photoredox‐catalyzed stereoconvergent cross‐electrophile coupling of racemic epoxides with alkenyl bromides is described, affording β‐alkenyl products with up to 95% ee, excellent E‐selectivity, and complete regiocontrol. These versatile intermediates enable diverse chiral synthons; mechanistic studies suggest a halide ring‐opening followed by ...
Hongyan Lan, Shengzhou Jin, Zhao‐Dong Xu, Guigen Li, Dingyi Wang   +4 more
wiley   +1 more source

Modular Access to α‐Tertiary Amines: Electrochemical Tandem Di‐Functionalization of Olefins With Ammonia Surrogates and Amino Acids

Angewandte Chemie, EarlyView.
A metal‐ and oxidant‐free electrochemical multicomponent di‐functionalization strategy that rapidly converts 1,1‐disubstituted alkenes into α‐tertiary primary amines with simultaneous installation of bio‐relevant sulfur or selenium motifs was devised for late‐stage functionalization. ABSTRACT Quaternary carbon centers, especially those bearing nitrogen,
Adrija Ghosh, Tarun, Sven Erik Peters, Lutz Ackermann, Debasis Banerjee   +4 more
wiley   +2 more sources

Synthesis of (3R,5R)-harzialactone A and its (3R,5S)-isomer

Beilstein Journal of Organic Chemistry, 2010
The total synthesis of (3R,5R)-harzialactone A (1) and its (3R,5S)-isomer (2) is described. Epoxide opening with thioacetal and diastereoselective reductions are used as key reactions.
Gowravaram Sabitha, Rangavajjula Srinivas, Sukant K. Das, Jhillu S. Yadav   +3 more
doaj   +1 more source

Diastereoselective desymmetric 1,2-cis-glycosylation of meso-diols via chirality transfer from a glycosyl donor

Nature Communications, 2020
Enzyme-catalyzed desymmetric glycosylations are often found in nature, however the corresponding chemical methods are lacking. Here, the authors report a highly diastereoselective desymmetric 1,2-cis-glycosylation of meso-diols found in myo-inositol 1,3 ...
Masamichi Tanaka, Koji Sato, Ryoki Yoshida, Nobuya Nishi, Rikuto Oyamada, Kazuki Inaba, Daisuke Takahashi, Kazunobu Toshima   +7 more
doaj   +1 more source

Stereoselective Synthesis of Euscapholide and Tetraketide via Prins Cyclisation and Ring-Closing Metathesis

SynOpen, 2022
A concise and diastereoselective total synthesis of tetraketide and euscapholide is described in ten steps in 10.6% overall yield from acetaldehyde and (S)-pent-4-ene-1,2-diol.
Dhanraj O. Biradar, Yogesh D. Mane, Basi V. Subba Reddy   +2 more
doaj   +1 more source

diastereoselectivity

, 2019
Citation: 'diastereoselectivity' in the IUPAC Compendium of Chemical Terminology, 3rd ed.; International Union of Pure and Applied Chemistry; 2006. Online version 3.0.1, 2019. 10.1351/goldbook.D01684 • License: The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International for individual terms.
openaire   +1 more source

Highly Diastereoselective Formal Nucleophilic Substitution of Bromocyclopropanes

, 2016
Highly Diastereoselective Formal Nucleophilic Substitution of ...
Marina Rubina (1874431), Bassam K. Alnasleh (2198467), Michael Rubin (1637770), Joseph Banning (2372428), William M. Sherrill (2372425)   +4 more
core   +2 more sources

Catalytic Diastereoselective Petasis Reactions [PDF]

Angewandte Chemie, 2011
Multicomponent Petasis reactions: the first diastereoselective Petasis reaction catalyzed by chiral biphenols that enables the synthesis of syn and anti β-amino alcohols in pure form has been developed. The reaction exploits a multicomponent approach that involves boronates, α-hydroxy aldehydes, and amines.
Giovanni, Muncipinto, Philip N, Moquist, Stuart L, Schreiber, Scott E, Schaus   +3 more
openaire   +2 more sources

Diastereoselective Hydroboration of Isopropenylcyclopropanes

, 2016
Diastereoselective Hydroboration of ...
Céline Hamel (3047295), Christophe Meyer (487051), Janine Cossy (1457317), Nicolas Blanchard (424195)   +3 more
core   +1 more source

Recent developments in the asymmetric Reformatsky-type reaction

Beilstein Journal of Organic Chemistry, 2018
This review collects the most important developments in asymmetric Reformatsky-type reactions published since the beginning of 2013, including both diastereoselective methodologies based on the use of chiral substrates and enantioselective catalytic ...
Hélène Pellissier
doaj   +1 more source