Chiral Bifunctional Thioureas and Squaramides Grafted into Old Polymers of Intrinsic Microporosity for Novel Applications
Abstract
:1. Introduction
2. Materials and Methods
2.1. Materials
2.2. Characterization Techniques
2.3. Synthesis of Grafted PIMs (I-VI)
2.3.1. Synthesis of Valine-Derived Thioureas (I) and (IV)
2.3.2. Synthesis of Valine-Derived Squaramides (II) and (V)
2.3.3. Synthesis of Cyclohexanediamine-Derived Thioureas (III) and (VI)
2.4. General Procedure for Asymmetric Reactions
2.4.1. General Procedure for Stereoselective Nitro-Michael Addition
2.4.2. General Procedure for Preparation of 2-Amino-4-(nitromethyl)-4H-chromene-3-carbonitrile from 2-(2-Nitrovinyl)phenol Derivative
2.5. Recyclability of the Grafted PIM’s Catalysts in the Asymmetric Reactions
3. Results and Discussion
3.1. Polymerization, Post-Modification, and Structural Characterization of PIMs
3.2. Evaluation of Catalytic Activity
4. Conclusions
Supplementary Materials
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
References
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Entry | 5a–c | Catalyst | t (H) | Product (Yield) b | Drc | Er d (Conf) |
---|---|---|---|---|---|---|
1 | 5a | I | 12 | 7a (71) | - | 79:21 (S) |
2 | 5a | II | 12 | 7a (69) | - | 81:19 (S) |
3 | 5a | III | 12 | 7a (79) | - | 93:7 (R) |
4 | 5a | IV | 6 | 7a (69) | - | 68:32 (S) |
5 | 5a | V | 12 | 7a (75) | 80:20 (S) | |
6 | 5a | VI | 12 | 7a (86) | - | 89:11 (R) |
7 | 5b | I | 1 | 7b (68) | 74:26 (S) | |
8 | 5b | II | 1 | 7b (72) | - | 96:4 (S) |
9 | 5b | V | 1 | 7b (75) | - | 92:8 (S) |
10 | 5b | VI | 1 | 7b (72) | 87:13 | 71:29 (R) |
11 | 5c | I | 1 | 7c (93) | 89:11 | 79:21 (S,R) e |
12 | 5c | II | 1 | 7c (89) | 91:9 | 81:19 (S,R) e |
13 | 5c | III | 1 | 7c (94) | 92:8 | 65:35 (R,S) e |
14 | 5c | VI | 1 | 7c (87) | 88:12 | 68:32 (R,S) e |
15 f | 5a | III | 12 | 7a (79) | - | 89:11 (R) |
16 f | 5a | III | 12 | 7a (82) | - | 86:14 (R) |
17 f | 5a | III | 12 | 7a (71) | - | 89:11 (R) |
18 f | 5a | III | 12 | 7a (68) | - | 90:10 (R) |
19 f | 5a | III | 12 | 7a (65) | - | 89:11 (R) |
20 g | 5b | II | 1 | 7b (81) | - | 95:5 (S) |
21 g | 5b | II | 1 | 7b (83) | - | 96:4 (S) |
22 g | 5b | II | 1 | 7b (79) | - | 94:6 (S) |
23 g | 5b | II | 1 | 7b (86) | - | 96:4 (S) |
24g | 5b | II | 1 | 7b (86) | - | 96:4 (S) |
Entry | Solvent | Catalyst | t (H) | Yield a | Erb (Conf) |
---|---|---|---|---|---|
1 | CH2Cl2 | I | 2 | 77 | 80:20 (S) |
2 | CH2Cl2 | II | 2 | 75 | 67:33 (S) |
3 | CH2Cl2 | III | 2 | 83 | 75:25 (R) |
4 | CH2Cl2 | IV | 2 | 70 | 68:32 (S) |
5 | CH2Cl2 | V | 2 | 68 | 65:35 (S) |
6 | CH2Cl2 | VI | 2 | 76 | 71:29 (R) |
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Valle, M.; Martín, L.; Maestro, A.; Andrés, J.M.; Pedrosa, R. Chiral Bifunctional Thioureas and Squaramides Grafted into Old Polymers of Intrinsic Microporosity for Novel Applications. Polymers 2019, 11, 13. https://doi.org/10.3390/polym11010013
Valle M, Martín L, Maestro A, Andrés JM, Pedrosa R. Chiral Bifunctional Thioureas and Squaramides Grafted into Old Polymers of Intrinsic Microporosity for Novel Applications. Polymers. 2019; 11(1):13. https://doi.org/10.3390/polym11010013
Chicago/Turabian StyleValle, María, Laura Martín, Alicia Maestro, José M. Andrés, and Rafael Pedrosa. 2019. "Chiral Bifunctional Thioureas and Squaramides Grafted into Old Polymers of Intrinsic Microporosity for Novel Applications" Polymers 11, no. 1: 13. https://doi.org/10.3390/polym11010013