A mangrove endophytic fungus(No.1947)was isolated from the leaves of Kandelia candel from all estuarine mangrove from the South China Sea.The secondary metabolites of this strain were studied firstly in this paper and...A mangrove endophytic fungus(No.1947)was isolated from the leaves of Kandelia candel from all estuarine mangrove from the South China Sea.The secondary metabolites of this strain were studied firstly in this paper and five compounds were isolated from the fermentation liquid.Their structures were elucidated by spectroscopy methods as three cyclodipeptides,cyclo-(Tyr-Tyr),cyclo-(Leu-Leu)and cyclo-(AIa-Leu),and Uracil and 5-isobutyl-2,4-imidazolidinedione.The results show that this fungal strain can produce abundant azacyclic compounds.展开更多
A convenient and efficient method for the conversion of serine and its derivatives to dehydroalanine with different bases and solvents was studied in this paper.The serine derivatives include Boc-N-L-Ser-OCH3（Ⅰ）Boc...A convenient and efficient method for the conversion of serine and its derivatives to dehydroalanine with different bases and solvents was studied in this paper.The serine derivatives include Boc-N-L-Ser-OCH3（Ⅰ）Boc-L-Ser-（OTs）-OCH3（Ⅱ）,and Boc-N-L-Ser-（Ⅰ）-OCH3（Ⅲ）.展开更多
文摘A mangrove endophytic fungus(No.1947)was isolated from the leaves of Kandelia candel from all estuarine mangrove from the South China Sea.The secondary metabolites of this strain were studied firstly in this paper and five compounds were isolated from the fermentation liquid.Their structures were elucidated by spectroscopy methods as three cyclodipeptides,cyclo-(Tyr-Tyr),cyclo-(Leu-Leu)and cyclo-(AIa-Leu),and Uracil and 5-isobutyl-2,4-imidazolidinedione.The results show that this fungal strain can produce abundant azacyclic compounds.
文摘A convenient and efficient method for the conversion of serine and its derivatives to dehydroalanine with different bases and solvents was studied in this paper.The serine derivatives include Boc-N-L-Ser-OCH3（Ⅰ）Boc-L-Ser-（OTs）-OCH3（Ⅱ）,and Boc-N-L-Ser-（Ⅰ）-OCH3（Ⅲ）.
