Contents...
i
Abstract
1. Synthesis of Nitrothioacetamides
1.1. Introduction
1.2. Results and Discussion 1.3. Possible Mechanism 1.4. Structure Proof
1.5. N-Nitrothioacetylvroline ethyl ester(24a) 1.6. N-Nitrothioacetylyroline benzyl ester (24b) 1.7. N-Nitrothioacetylvaline ethyl ester(27a) 1.8. Experimental Section
1.9. References
2. Reactions of Nitrothioacetamides
2.1. Introduction
2.2. Alkylation Reactions 2.3. Allylation Reactions
2.6. Reduction of nitro group of nitrothioacetamides 2.7. Experimental Section
2.8. References
2.4. Isolation of the intermediate 2.5. Synthesis of thiophenes
3. Diastereoselectivity in thio-Claisen rearrangement
4. Designing organic molecules for non linear optics
4.1. Introduction 4.2. Results 4.3. Discussion
4.4. Conformational studies 4.5. Experimental Section 4.6. References
5. Non-bonded attractive interactions involving S and O atoms
5.1. Introduction 5.2. Results 5.3. Discussion
5.4. Theoretical Results 5.5. Experimental Section 5.6. References
1 9
9 15 20 24 25 30 30 34 40
42
42 42 44 50 52 58 60 63
64
64 65 76 79 89 94 97 99
101
101 104 114 116 123 126
127
127 132 143 149 152 155 3.1. Introduction
3.2. Results 3.3. Discussion
3.4. Determination of absolute configuration 3.5. Extension to Valine derivative
3.6. Effect of push-pull system on thio Claisen rearrangement 3.7. Experimental Section
3.8. References
