Methods of using [3.2.0] heterocyclic compounds and analogs thereof
a heterocyclic compound and compound technology, applied in the field of methods of using heterocyclic compounds, can solve the problems of infectious diseases, fungi and protozoa are becoming increasingly difficult to treat and cure, and the cure of diseases is difficul
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example 1
Fermentation of Compound of Formulae II-16 II-20. and II-24C
Strain CNB476 was grown in a 500-ml flask containing 100 ml of vegetative medium consisting of the following per liter of deionized water: glucose, 4 g; Bacto tryptone, 3 g; Bacto casitone, 5 g; and synthetic sea salt (Instant Ocean, Aquarium Systems), 30 g. The first seed culture was incubated at 28 degree C. for 3 days on a rotary shaker operating at 250 rpm. Four ml each of the first seed culture was inoculated into three 500-ml flasks containing of 100 ml of the vegetative medium. The second seed cultures were incubated at 28 degree C. and 250 rpm on a rotary shaker for 2 days. Four ml each of the second seed culture was inoculated into thirty-five 500-ml flasks containing of 100 ml of the vegetative medium. The third seed cultures were incubated at 28 degree and 250 rpm on a rotary shaker for 2 days. Four ml each of the third seed culture was inoculated into four hundred 500-ml flasks containing 100 ml of the product...
example 2
Purification of Compound of Formulae II-16, II-20 and II-24C
The pure compounds of Formulae II-16, II-20 and II-24C were obtained by flash chromatography followed by HPLC. Eight grams crude extract containing 3.8 grams of the compound of Formula II-16 and lesser quantities of II-20 and II-24C was processed by flash chromatography using Biotage Flash40i system and Flash 40M cartridge (KP-Sil Silica, 32-63 μm, 90 grams). The flash chromatography was developed by the following step gradient: 1. Hexane (1 L) 2. 10% Ethyl acetate in hexane (1 L) 3. 20% Ethyl acetate in hexane, first elution (1 L) 4. 20% Ethyl acetate in hexane, second elution (1 L) 5. 20% Ethyl acetate in hexane, third elution (1 L) 6. 25% Ethyl acetate in hexane (1 L) 7. 50% Ethyl acetate in hexane (1 L) 8. Ethyl acetate (1 L)
Fractions containing the compound of Formula II-16 in greater or equal to 70% UV purity by HPLC were pooled and subject to HPLC purification, as described below, to obtain II-16, along w...
example 3
Fermentation of Compounds of Formulae II-17 and II-18
Strain CNB476 was grown in a 500-ml flask containing 100 ml of the first vegetative medium consisting of the following per liter of deionized water: glucose, 4 g; Bacto tryptone, 3 g; Bacto casitone, 5 g; and synthetic sea salt (Instant Ocean, Aquarium Systems), 30 g. The first seed culture was incubated at 28 degree C. for 3 days on a rotary shaker operating at 250 rpm. Five ml of the first seed culture was inoculated into a 500-ml flask containing 100 ml of the second vegetative medium consisting of the following per liter of deionized water: starch, 10 g; yeast extract, 4 g; peptone, 2 g; ferric sulfate, 40 mg; potassium bromide, 100 mg; calcium carbonate, 1 g; and sodium bromide, 30 g. The second seed cultures were incubated at 28° C. for 7 days on a rotary shaker operating at 250 rpm. Approximately 2 to 3 gram of sterile Amberlite XAD-7 resin were added to the second seed culture. The second seed culture was further incubat...
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