Optimized Methodologies in Asymmetric Organic Synthesis Applying Microwaves
DOI:
https://doi.org/10.29356/jmcs.v53i3.998Keywords:
Microwaves, Reaction Optimization, Organocatalysts, β-amino Acids, β-peptidesAbstract
The use of microwave heating is a valuable tool for synthetic chemists. Being able to reduce reaction times and to increase product yield, this methodology offers to organic chemists the potential to optimize reaction processes. Additionally, microwave-assisted reactions provide more environmentally friendly reaction conditions. In this report, we describe results in the optimization of several organic reactions employed in the synthesis of various chiral molecules such as heterocycles, β-amino acids, and β-peptides, among others.
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32. Crystal data for 19: C22H26N2O2, monoclinic, space group P 2(1), a = 10.9924(11)Å, b = 6.5469(19)Å, c = 13.2954(09)Å, α = γ = 90°, β = 96.4848(68)°, V = 950.6Å3, crystal size: 0.3 × 0.2 × 0.1 mm3, R1 = 0.0441 (wR2 = 0.1087). Crystal data for 21: C22H26N2S2, monoclinic, space group P 2(1), a = 12.56660(50)Å, b = 6.03300(20)Å, c = 13.00150(59)Å, α = γ = 90°, β = 92.3405(15)°, V = 984.8776(68)Å3, crystal size: 0.88x0.20x0.15 mm3, R1 = 0.0427 (wR2 = 0.1223). Crystal data for 29: C23H23NO2, monoclinic, space group P 2(1), a = 9.8525(20)Å, b = 6.0365(12)Å, c = 16.2635(33)Å, α = γ = 90°, β = 104.788(30)°, V = 935.225Å3, crystal size: 0.3 × 0.2 × 0.1 mm3, R1 = 0.0379 (wR2 = 0.0932). CCDC 740273 (19), CCDC 740274 (21), and CCDC 740275 (29) contain the supplementary crystallographic data for this paper. These data can be obtained free of charge from The Cambridge Crystallographic Data Center via http://www.ccdc.cam.ac.uk/data_request/cif.
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