Stereoselective Organocatalyzed Synthesis of α-Fluorinated β-Amino Thioesters and Their Application in Peptide Synthesis
作者:Elena Cosimi、Oliver D. Engl、Jakub Saadi、Marc-Olivier Ebert、Helma Wennemers
DOI:10.1002/anie.201607146
日期:2016.10.10
β‐amino thioesters were obtained in high yields and stereoselectivities by organocatalyzed addition reactions of α‐fluorinated monothiomalonates (F‐MTMs) to N‐Cbz‐ and N‐Boc‐protected imines. The transformation requires catalyst loadings of only 1 mol % and proceeds under mild reaction conditions. The obtained addition products were readily used for coupling‐reagent‐free peptidesynthesis in solution
Direct asymmetric Mannich reaction of phthalides: facile access to chiral substituted isoquinolines and isoquinolinones
作者:Jie Luo、Haifei Wang、Fangrui Zhong、Jacek Kwiatkowski、Li-Wen Xu、Yixin Lu
DOI:10.1039/c2cc31439h
日期:——
The first Mannich reaction employing phthalides using a quinidine-based multifunctional catalyst has been developed. The reported method led to the synthesis of 3,3-disubstituted phthalide derivatives in excellent yields, with good diastereo- and enantioselectivities. Convenient synthesis of chiral isoquinolinones and isoquinolines has also been demonstrated.
Zn-ProPhenol Catalyzed Enantio- and Diastereoselective Direct Vinylogous Mannich Reactions between α,β- and β,γ-Butenolides and Aldimines
作者:Barry M. Trost、Elumalai Gnanamani、Jacob S. Tracy、Christopher A. Kalnmals
DOI:10.1021/jacs.7b11361
日期:2017.12.20
We report a Zn-ProPhenol catalyzedreaction between butenolides and imines to obtain tetrasubstituted vinylogous Mannich products in good yield and diastereoselectivity with excellent enantioselectivity (97 to >99.5% ee). Notably, both α,β- and β,γ-butenolides can be utilized as nucleophiles in this transformation. The imine partner bears the synthetically versatile N-Cbz group, avoiding the use of
Enantio- and Diastereoselective Double Mannich Reaction between Ketones and Imines Catalyzed by Zn-ProPhenol
作者:Barry M. Trost、Elumalai Gnanamani
DOI:10.1021/acs.orglett.0c00318
日期:2020.2.21
Herein we present a Zn-ProPhenol-catalyzed double Mannich reaction between ynones and imines that generates 1,3-diamines in excellent yield as well as diastereo- and enantioselectivity (>99.5% ee). With 2.2 equiv of a single imine electrophile, we obtain pseudo-symmetrical diamines whereas, with two different imine partners, we obtain unsymmetrically substituted 1,3-diamines with three contiguous stereocenters
Elaborating Complex Heteroaryl‐Containing Cycles via Enantioselective Palladium‐Catalyzed Cycloadditions
作者:Barry M. Trost、Zhiwei Jiao、Chao‐I. (Joey) Hung
DOI:10.1002/anie.201910061
日期:2019.10.14
asymmetric synthesis of heteroaryl-containing cycles via palladium-catalyzedcyclization is reported. Most classes of nitrogen-containing aromatics, including pyridines, quinolines, pyrimidines, various azoles and the derivatives of nucleobases are compatible substrates, offering various heteroaryl-substituted cyclopentane, pyrrolidine, furanidine and bicyclo[4.3.1]decadiene derivatives with good to