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[ Last edited by jw227 on 2009-9-27 at 09:11 ]
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hexinhua0920

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3Â¥2009-09-27 09:49:58
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hexinhua0920

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¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï
º£Èôqi(½ð±Ò+5,VIP+0):лл 9-27 20:05
472514568(½ð±Ò+2,VIP+0):½±Àø»ý¼«»ØÌû 9-28 14:47
¡¾Ò©ÎïÃû³Æ¡¿Piperacillin
»¯Ñ§½á¹¹Ê½(Chemical Structure):


²Î¿¼ÎÄÏ×No. 800605
±êÌâ: Piperacillin
×÷Õß: Loren, J.G.; Castañer, J.
À´Ô´: Drugs Fut 1978,3(11),829

ºÏ³É·Ïßͼ½â˵Ã÷:
The cyclization of diethyl oxalate (I) with N-ethylethylenediamine (II) in ethanol gives ethyl-2,3-dioxopiperazine (III), which by reaction first with trimethylsilyl chloride and triethytamine and then with phosgene in THF is converted into 4-ethyl-2,3-dioxopiperazine-1-carboxylic acid chloride (IV). Finally, this compound is condensed with 6-D-(-)-alpha-aminophenylacetamidopenicillanic acid (V) by means of triethylamine in THF - water.

²Î¿¼ÎÄÏ×No. 800606
±êÌâ: Penicillins and cephalosporins and process for producing the same
×÷Õß: Saikawa, I.; et al.
À´Ô´: DE 2519400; FR 2269937; FR 2320295; GB 1508062

ºÏ³É·Ïßͼ½â˵Ã÷:
The cyclization of diethyl oxalate (I) with N-ethylethylenediamine (II) in ethanol gives ethyl-2,3-dioxopiperazine (III), which by reaction first with trimethylsilyl chloride and triethytamine and then with phosgene in THF is converted into 4-ethyl-2,3-dioxopiperazine-1-carboxylic acid chloride (IV). Finally, this compound is condensed with 6-D-(-)-alpha-aminophenylacetamidopenicillanic acid (V) by means of triethylamine in THF - water.
2Â¥2009-09-27 09:49:07
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

hexinhua0920

ľ³æ (ÕýʽдÊÖ)

4Â¥2009-09-27 10:20:19
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

º£Èôqi

Ìú¸Ëľ³æ (ÖøÃûдÊÖ)

ÒýÓûØÌû:
Originally posted by hexinhua0920 at 2009-9-27 09:49:
¡¾Ò©ÎïÃû³Æ¡¿Piperacillin
»¯Ñ§½á¹¹Ê½(Chemical Structure):


²Î¿¼ÎÄÏ×No. 800605
±êÌâ: Piperacillin
×÷Õß: Loren, J.G.; Castañer, J.
À´Ô´: Drugs Fut 1978,3(11),829

ºÏ³É·Ïßͼ½â˵Ã÷:
...

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