175154-37-7

Upstream product

• 5680-79-5 glycine ethyl ester hydrochloride 
• 446-52-6 2-Fluorobenzaldehyde 

Downstream Products

• 1241941-52-5 methyl 5-(2-fluorophenyl)-4-(2,2,2-trifluoroacetyl)-1H-pyrrole-2-carboxylate 
• 1393594-64-3 C₁₂H₁₀FNO₂ 
• 1429769-12-9 methyl (3aS,3bR,4S,5S,7R,7aR,8S,8aS)-7-(2-fluorophenyl)-2-methyl-1,3-dioxo-4-(p-tolyl)-2,3,3a,4,5,6,7,7a,8,8a-decahydro-1H-3b,8-ethenopyrrolo[3',4':3,4]cyclopenta[1,2-c]pyridine-5-carboxylate 
• 1450766-08-1 methyl (3aR,3bS,4R,5R,7S,7aS,8R,8aR)-7-(2-fluorophenyl)-2-methyl-1,3-dioxo-4-(p-tolyl)-2,3,3a,4,5,6,7,7a,8,8a-decahydro-1H-3b,8-ethenopyrrolo[3',4':3,4]cyclopenta[1,2-c]pyridine-5-carboxylate 

Relevant academic research and scientific papers

Enantioselective Mannich Reaction of Glycine Iminoesters with N-Phosphinoyl Imines: A Bifunctional Approach

A bifunctional catalytic approach for the asymmetric Mannich reaction of glycine iminoesters with N-phosphinoyl imines has been developed. By the combination of metal catalysis and organocatalysis, the vicinal two stereogenic centers were efficiently constructed, affording a wide range of syn-diamino esters in high yields with excellent enantio- and diastereoselectivities (up to >99:1 dr, 99% ee).

Copper/GanPhos-Catalyzed 1,3-Dipolar Cycloaddition of Azo?-methine Ylides: An Efficient Access to Chiral Pyrrolidine Spirocycles

A highly efficient copper/GanPhos-catalyzed 1,3-dipolar cyclo?-addition?-of azomethine ylides is reported. This viable transformation provides a series of optically active spiro[dihydronaphthalene-2,3′-pyrrolidine]s, bearing one spiro quaternary and three tertiary stereogenic centers, in good yields and with high ee values. This protocol features high diastereo- A nd enantioselectivity, broad substrate scope and mild reaction conditions.

Well-Designed Phosphine-Urea Ligand for Highly Diastereo- and Enantioselective 1,3-Dipolar Cycloaddition of Methacrylonitrile: A Combined Experimental and Theoretical Study

A novel chiral phosphine-urea bifunctional ligand has been developed for Cu-catalyzed asymmetric 1,3-dipolar cycloaddition of iminoesters with methacrylonitrile, a long-standing challenging substrate in asymmetric catalysis. Distortion-interaction energy analysis based on density functional theory (DFT) calculations reveals that the distortion energy plays an important role in the observed enantioselectivity, which can be attributed to the steric effect between the phosphine ligand and the dipole reactant. DFT calculations also indicate that nucleophilic addition is the enantioselectivity-determining step and hydrogen bonding between the urea moiety and methacrylonitrile assists in control of the diastereo- and enantioselectivity. By a combination of metal catalysis and organocatalysis, excellent diastereo- and enantioselectivities (up to 99:1 diastereomeric ratio, 99% enantiomeric excess) as well as good yields are achieved. A wide range of substitution patterns of both iminoester and acrylonitrile is tolerated by this catalyst system, providing access to a series of highly substituted chiral cyanopyrrolidines with up to two quaternary stereogenic centers. The synthetic utility is demonstrated by enantioselective synthesis of antitumor agent ETP69 with a pivotal nitrile pharmacophore and an all-carbon quaternary stereogenic center.

Ag/P-Stereogenic Phosphine-Catalyzed Enantioselective 1,3-Dipolar Cycloadditions: A Method to Optically Active Pyrrolidines

A Ag/P-stereogenic phosphine-complex-catalyzed 1,3-dipolar cycloaddition of azomethine ylides with electron-deficient olefins is reported. In this reaction, highly functionalized pyrrolines with a spiro-quaternary stereogenic center were obtained in good yields (up to 99%) with excellent levels of diastereo-(up to >20:1 dr) and enantioselectivities (up to >99% ee). The chirality of adducts was controlled predominantly by the P-stereogenic phosphines.

Application of the Cu(i)/TEMPO/O2 catalytic system for aerobic oxidative dehydrogenative aromatization of pyrrolidines

A Cu(i)/TEMPO (2,2,6,6-tetramethyl-1-piperidinyloxy)-catalyzed aerobic oxidative dehydrogenative aromatization reaction of fully saturated pyrrolidines to synthesize multi-substituted pyrroles was developed for the first time. The use of a non-precious metal catalyst, green oxidant and environmentally friendly solvent made the reaction more sustainable.

Tandem nucleophilic addition-cycloaddition of arynes with α-iminoesters: Two concurrent pathways to imidazolidines

The tandem nucleophilic addition-cycloaddition reaction has been developed for the synthesis of functionalized imidazolidine derivatives. A variety of α-iminoesters and aryne precursors were well tolerated under the mild reaction conditions. This asymmetric cycloaddition afforded imidazolidine derivatives with high yields, complete regioselectivities, and excellent diastereo- and enantioselectivities. Aryne-induced ylides working as 1,3-dipoles for asymmetric cycloaddition are the notable feature of the present reaction. In the tandem reaction, the [3+2] cycloaddition of aryne-induced ylides with metallized α-iminoesters and metal-catalyzed [3+2] cycloaddition of azomethine ylide with α-iminoesters are two concurrent pathways to imidazolidines.

Silicon-based Bulky Group?Tuned Parallel Kinetic Resolution in Copper-Catalyzed 1,3-Dipolar Additions

The development of new strategies or reaction processes that tease new reactivity of functional groups continues to spur synthetic chemists toward innovative solutions that access new compounds. Herein, we find that the silicon-based bulky group enables a 1,3-dipolar addition?initiated parallel kinetic resolution (PKR) to occur unexpectedly, leading to the highly enantioselective synthesis of two structurally different types of amino acid derivatives via chemodivergent [3+2] cycloaddition reactions and tandem conjugate addition-elimination reaction respectively. The resulting and structurally divergent enantioenriched amino acid derivatives that contain four contiguous stereogenic centers and an all-carbon quaternary center were obtained with up to 99% ee with >95:1 dr and good yields. (Figure presented.).

Synthesis of Pyrrole via a Silver-Catalyzed 1,3-Dipolar Cycloaddition/Oxidative Dehydrogenative Aromatization Tandem Reaction

Pyrroles are an important group of heterocyclic compounds with a wide range of interesting properties, which have resulted in numerous applications in a variety of fields. Despite the importance of these compounds, there have been few reports in the literature pertaining to the synthesis of pyrroles from simple alkenes using a one-pot sequential 1,3-dipolar cycloaddition/aromatization reaction sequence. Herein, we report the development of a benzoyl peroxide-mediated oxidative dehydrogenative aromatization reaction for the construction of pyrroles. We subsequently developed a one-pot tandem reaction that combined this new method with a well-defined silver-catalyzed 1,3-dipolar cycloaddition reaction, thereby providing a practical method for the synthesis of multisubstituted pyrroles from easy available alkenes. The mechanism of this oxidative dehydrogenative aromatization reaction was also examined in detail.

Discovery of inhibitors of the wnt and hedgehog signaling pathways through the catalytic enantioselective synthesis of an iridoid-inspired compound collection

Cousins you can count on: An iridoid-inspired compound collection was synthesized efficiently by the resolution of cyclic enones in an asymmetric cycloaddition with azomethine ylides. The collection contained novel potent inhibitors of the Wnt and Hedgehog signaling pathways. Copyright

Synthesis of highly substituted nitropyrrolidines, nitropyrrolizines and nitropyrroles via multicomponent-multistep sequences within a flow reactor

We expand upon recent results concerning dipolar cycloaddition reactions of unstabilized azomethine ylids with nitro alkenes to generate 3-nitropyrrolidines via a flow chemistry sequence. This new work describes the development of a three-component coupling reaction between glycine esters, aldehydes and nitro alkenes. In order to further demonstrate the utility of flow technology in concert with heterogeneous reagents and scavengers for complex reaction sequences an in-line oxidation resulting in the conversion of tetra-substituted pyrrolidines to their pyrrole congeners has been developed. The Japan Institute of Heterocyclic Chemistry.