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Naganagowda, Gadada,Petsom, Amorn Korean Chemical Society 2011 Bulletin of the Korean Chemical Society Vol.32 No.11
3-Chloro-1-benzothiophene-2-carbonyl chloride 1 was reacted with glycine in acetone to give 3-chloro-1-benzothiophen-2-yl-carbonylaminoacetic acid 2. Various aldehydes on treatment with compound 2 in acetic anhydride to gave 1,3-oxazol-5-ones 3a-d. These oxazolones was treated with aromatic amines or hydrazides to get various imidazol-4-ones 4a-t or 5a-l. Oxazolones 3a-d was also treated with aromatic hydrazines, expansion of five member oxazole ring to six member triazine ring occurs to yield 1,2,4-triazin-6-ones 6a-h. The structures of all the synthesized compounds were confirmed by spectral data and had been screened for antibacterial activity.
Gadada Naganagowda,Amorn Petsom 대한화학회 2011 Bulletin of the Korean Chemical Society Vol.32 No.11
3-Chloro-1-benzothiophene-2-carbonyl chloride 1 was reacted with glycine in acetone to give 3-chloro-1-benzothiophen-2-yl-carbonylaminoacetic acid 2. Various aldehydes on treatment with compound 2 in acetic anhydride to gave 1,3-oxazol-5-ones 3a-d. These oxazolones was treated with aromatic amines or hydrazides to get various imidazol-4-ones 4a-t or 5a-l. Oxazolones 3a-d was also treated with aromatic hydrazines,expansion of five member oxazole ring to six member triazine ring occurs to yield 1,2,4-triazin-6-ones 6a-h. The structures of all the synthesized compounds were confirmed by spectral data and had been screened for antibacterial activity.
Naganagowda, Gadada,Thamyongkit, Patchanita,Petsom, Amorn Korean Chemical Society 2011 대한화학회지 Vol.55 No.5
3-Chloro-1-benzothiophene-2-carbonylchloride (1) was allowed to react with glycine to give 3-chloro-1-benzothiophen-2-yl-carbonylaminoacetic acid (2). Various aldehydes were treated with compound (2) in acetic anhydride to get 1,3-oxazol-5-ones (3a-d). These oxazolones were treated with aromatic amines or hydrazides to get various imidazol-4-ones (4a-h or 5al) separately. Oxazolones was also treated with aromatic hydrazine, through which expansion of five membered oxazole ring to six member triazine ring occurs to yield 1,2,4-triazin-6-ones (6a-h). The structures of all the synthesized compounds were confirmed by spectral data and were screened for antibacterial and antifungal activities.
Surachai Pornpakakul,Jatupol Liangsakul,Nattaya Ngamrojanavanich,Sophon Roengsumran,Prakitsin Sihanonth,Jittra Piapukiew,Ek Sangvichien,Songchan Puthong,Amorn Petsom 대한약학회 2006 Archives of Pharmacal Research Vol.29 No.2
Four xanthones were isolated from mycelia of Emericella variecolor, an endophytic fungus isolated from the leaves of Croton oblongifolius. Their structures were elucidated by spectroscopic analysis to be shamixanthone, 14-methoxytajixanthone-25-acetate, tajixanthone methanoate, and tajixanthone hydrate. All compounds were tested for cytotoxic activity against various human tumor cell lines including gastric carcinoma, colon carcinoma, breast carcinoma, human hepatocarcinoma, and lung carcinoma. The antitumor activities of these xanthones were compared with that of doxorubicin hydrochloride, a chemotherapeutic substance. All of them showed moderate activities and were selective against gastric carcinoma, colon carcinoma, and breast carcinoma. Only tajixanthone hydrate exhibited moderate activity against all cancer cell lines. Furthermore, under the test conditions it was found that 14-methoxytajixanthone- 25-acetate and tajixanthone hydrate are almost as active as doxorubicin hydrochloride against gastric carcinoma (KATO3) and breast carcinoma (BT474).
Pornpakakul Surachai,Liangsakul Jatupol,Ngamrojanavanich Nattaya,Roengsumran Sophon,Sihanonth Prakitsin,Piapukiew Jittra,Sangvichien Ek,Puthong Songchan,Petsom Amorn The Pharmaceutical Society of Korea 2006 Archives of Pharmacal Research Vol.29 No.2
Four xanthones were isolated from mycelia of Emericella variecolor, an endophytic fungus isolated from the leaves of Croton oblongifolius. Their structures were elucidated by spectroscopic analysis to be shamixanthone, 14-methoxytajixanthone-25-acetate, tajixanthone methanoate, and tajixanthone hydrate. All compounds were tested for cytotoxic activity against various human tumor cell lines including gastric carcinoma, colon carcinoma, breast carcinoma, human hepatocarcinoma, and lung carcinoma. The antitumor activities of these xanthones were compared with that of doxorubicin hydrochloride, a chemotherapeutic substance. All of them showed moderate activities and were selective against gastric carcinoma, colon carcinoma, and breast carcinoma. Only tajixanthone hydrate exhibited moderate activity against all cancer cell lines. Furthermore, under the test conditions it was found that 14-methoxytajixanthone-25-acetate and tajixanthone hydrate are almost as active as doxorubicin hydrochloride against gastric carcinoma (KATO3) and breast carcinoma (BT474).