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biptyw(½ð±Ò+1): лл²ÎÓë
markar: ½ð±Ò+1, ¸Ðл»ØÌû½»Á÷£¡ 2012-09-27 21:09:31
biptyw: ½ð±Ò+1, À÷º¦°¡£¬Ô­À´ÕæµÄÓд𰸰¡¡£ 2012-09-28 18:06:59
ÒýÓûØÌû:
13Â¥: Originally posted by ruinyan at 2012-09-27 14:48:56
¾©ÄáÆ½·Ö×ÓÄÚÒþº¬Ò»¸öÎì¶þÈ©µÄ½á¹¹£¬ÄÜÓë°±»ù×Ô·¢·´Ó¦£¬Éú³ÉÎïÓÐÓ«¹âЧӦ£¬±ãÓÚʵÑé¹Û²ì¡£²úÎïÊÇÉîÀ¶ÂÌÉ«µÄ£¬Èç¹ûʵÑé¶ÔÑÕÉ«ÓÐÒªÇóµÄ»°ÒªÁíÍ⿼ÂÇÁË¡£´ËÍ⾩ÄáÆ½ÊÇ´ÓÌìÈ»²úÎïÌáÈ¡³öÀ´µÄ£¬±ÈÎì¶þÈ©¶¾ÐÔС5000-10000±¶ ...

Very good comment from Ruinyan. ~

Here is the proposed mechanism:

'The reaction occurred through a nucleophilic attack of the primary amine on the C3 carbon of genipin.  This caused an opening of the dihydropyran ring.  An attack on the resulting aldehyde group by the secondary amine group then followed. '

Ref.:  

Mechanism and kinetics of the crosslinking reaction between biopolymers containing primary amine groups and genipin
Journal of Polymer Science Part A: Polymer Chemistry
Volume 41, Issue 24, pages 3941¨C3953, 15 December 2003

proposed mechanism.gif

14Â¥2012-09-27 17:44:00
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biptyw(½ð±Ò+1): лл²ÎÓë
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13Â¥2012-09-27 14:48:56
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injectable

ľ³æ (ÖøÃûдÊÖ)


¡ï ¡ï
biptyw(½ð±Ò+1): лл²ÎÓë
mwyuer: ½ð±Ò+1, ¸Ðл»ØÌû½»Á÷ 2012-07-04 16:07:24
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4Â¥2012-07-04 13:50:29
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lynne619

ľ³æ (ÖøÃûдÊÖ)


¡ï
markar: ½ð±Ò+1, ¸Ðл»ØÌû½»Á÷£¡ 2012-09-27 21:08:37
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8Â¥2012-07-06 08:29:46
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ÒýÓûØÌû:
14Â¥: Originally posted by aircraftvip at 2012-09-27 17:44:00
Very good comment from Ruinyan. ~

Here is the proposed mechanism:

'The reaction occurred through a nucleophilic attack of the primary amine on the C3 carbon of genipin.  This caused an opening ...

ÎÞÓïÁË£¬·Ñ°ëÌì¾¢²éÎÄÏ×£¬Ã»ÓйØ×¢°¡
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15Â¥2012-09-28 22:29:14
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lynne619

ľ³æ (ÖøÃûдÊÖ)


¡ï ¡ï
biptyw(½ð±Ò+1): лл²ÎÓë
mwyuer: ½ð±Ò+1, ¸Ðл»ØÌû½»Á÷ 2012-07-06 08:47:50
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5Â¥2012-07-05 16:19:03
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biptyw

ľ³æ (ÕýʽдÊÖ)


ÒýÓûØÌû:
5Â¥: Originally posted by lynne619 at 2012-07-05 16:19:03
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6Â¥2012-07-05 17:03:07
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biptyw

ľ³æ (ÕýʽдÊÖ)


ÒýÓûØÌû:
8Â¥: Originally posted by lynne619 at 2012-07-06 08:29:46
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9Â¥2012-07-06 11:44:15
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lynne619

ľ³æ (ÖøÃûдÊÖ)


ÒýÓûØÌû:
9Â¥: Originally posted by biptyw at 2012-07-06 11:44:15
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10Â¥2012-07-06 12:02:28
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wangwenyan

гæ (СÓÐÃûÆø)


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biptyw(½ð±Ò+1): лл²ÎÓë
markar: ½ð±Ò+1, ¸Ðл»ØÌû½»Á÷£¡ 2012-09-27 21:09:05
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11Â¥2012-09-26 16:00:09
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xflpy168

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biptyw(½ð±Ò+1): лл²ÎÓë
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12Â¥2012-09-26 23:35:31
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biptyw

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ÒýÓûØÌû:
15Â¥: Originally posted by aircraftvip at 2012-09-28 22:29:14
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16Â¥2012-09-29 09:05:31
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Ü·Ü·¹«×Ó12

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markar: ½ð±Ò+1, ¸Ðл»ØÌû½»Á÷£¡ 2012-11-13 21:57:55
ÒýÓûØÌû:
13Â¥: Originally posted by ruinyan at 2012-09-27 14:48:56
¾©ÄáÆ½·Ö×ÓÄÚÒþº¬Ò»¸öÎì¶þÈ©µÄ½á¹¹£¬ÄÜÓë°±»ù×Ô·¢·´Ó¦£¬Éú³ÉÎïÓÐÓ«¹âЧӦ£¬±ãÓÚʵÑé¹Û²ì¡£²úÎïÊÇÉîÀ¶ÂÌÉ«µÄ£¬Èç¹ûʵÑé¶ÔÑÕÉ«ÓÐÒªÇóµÄ»°ÒªÁíÍ⿼ÂÇÁË¡£´ËÍ⾩ÄáÆ½ÊÇ´ÓÌìÈ»²úÎïÌáÈ¡³öÀ´µÄ£¬±ÈÎì¶þÈ©¶¾ÐÔС5000-10000±¶ ...

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17Â¥2012-11-13 16:40:22
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linpeng816

Ìú³æ (СÓÐÃûÆø)

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Сľ³æ: ½ð±Ò+0.5, ¸ø¸öºì°ü£¬Ð»Ð»»ØÌû
ºìÖÛÁ÷ÐÇ: ½ð±Ò+1, »¶Ó­Ð³æÀ´µ½ÉúÎ﹦ÄܲÄÁϰå¿é½»Á÷ 2012-12-05 12:30:44
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18Â¥2012-12-05 11:03:43
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lynne619

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¡ï
Сľ³æ: ½ð±Ò+0.5, ¸ø¸öºì°ü£¬Ð»Ð»»ØÌû
ÒýÓûØÌû:
14Â¥: Originally posted by aircraftvip at 2012-09-27 17:44:00
Very good comment from Ruinyan. ~

Here is the proposed mechanism:

'The reaction occurred through a nucleophilic attack of the primary amine on the C3 carbon of genipin.  This caused an opening ...

¿´ÁËͼ¾ÍÃ÷°×ÁË£¬Óлú»¯Ñ§¶¼Ñ§¹ýÀàËÆ¡£
19Â¥2012-12-05 20:39:51
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ëë¶¹

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ÒýÓûØÌû:
5Â¥: Originally posted by lynne619 at 2012-07-05 16:19:03
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20Â¥2013-03-14 15:48:35
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biptyw

ľ³æ (ÕýʽдÊÖ)


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20Â¥: Originally posted by ëë¶¹ at 2013-03-14 15:48:35
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21Â¥2013-03-15 14:23:10
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linpeng816

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22Â¥2013-05-11 01:26:53
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oceanwave5

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ÒýÓûØÌû:
17Â¥: Originally posted by Ü·Ü·¹«×Ó12 at 2012-11-13 16:40:22
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2012-07-04 11:23  
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Ayse3Â¥
2012-07-04 11:42  
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2012-07-05 22:49  
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