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The Development of Novel Antibiotics Using ... - Jacobs University

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Scheme 13. Proposed fragmentation mechanism for macrocycle (15)……………...…………..………….34<br />

Figure 59. APCI-MS spectrum for macrocycle (16)….……………………………………………………34<br />

Figure 60. Tandem APCI-MS 2 spectrum for macrocycle (16)……………………………………………..34<br />

Scheme 14. Proposed fragmentation mechanism for macrocycle (16)……………...………………..…….35<br />

Figure 61. 1 H-NMR spectrum for macrocycle (16)………………………………………………………...35<br />

Figure 62. APCI-MS 2 spectrum for macrocycle (18)…………………………...….……………………....36<br />

Figure 63. Tandem APCI-MS 2 spectrum for macrocycle (18)……………………………………………..36<br />

Scheme 15. Proposed fragmentation mechanism for macrocycle (17)……………...……………..……….36<br />

Figure 64. APCI-MS 2 spectrum for macrocycle (18)……………………………….……………………...37<br />

Figure 65. Tandem APCI-MS 2 spectrum for macrocycle (18)……………………………….…………….37<br />

Scheme 16. Proposed fragmentation mechanism for macrocycle (18)………………..……………..……..37<br />

Figure 66. 1 H-NMR spectrum for macrocycle (18)………………………………………………………...38<br />

Figure 67. Stacked 1 H-NMR spectra for macrocycle (14)……………...……….…………………………38<br />

Figure 68. 2D-ROESY spectrum for macrocycle (17)……………………………………………………..39<br />

Figure 69. Through space interactions <strong>of</strong> different protons for macrocycle (17)...……………………..39<br />

Molecular modelling data for the computed structure (14a)…......…………………………………………40<br />

Molecular modelling data for the computed structure (14b)…………...…..………………………………42<br />

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