24СʱÈÈÃŰæ¿éÅÅÐаñ    

²é¿´: 820  |  »Ø¸´: 5
µ±Ç°Ö»ÏÔʾÂú×ãÖ¸¶¨Ìõ¼þµÄ»ØÌû£¬µã»÷ÕâÀï²é¿´±¾»°ÌâµÄËùÓлØÌû

moonface551

¾èÖú¹ó±ö (СÓÐÃûÆø)

[ÇóÖú] ÎÄÕÂÐÞ»Ø ÇóÖúÒ»¸öÎÊÌ⣬´ó¼Ò°ïæ°¡£¡

Éó¸åÈËÌá³öÒ»¸öÎÊÌ⣺The structure elucidation based on the 2D NMR also did not unambiguously determine the position of the methoxy.

ÎҵĻشðÈëÏ£¬Ï£Íû´ó¼Ò¸ø¿´¿´ÎÒµÄÓ¢Îıí´ïÊÇ·ñÕýÈ·Çå³þ
As far as we known, the position of the methoxy is usually determined by HMBC spectrum. The methoxy group was attached to which position according to the correlations of H (-OCH3) with which C. The correlation signal is the strongest when H and C are interval of three bonds. Here, we added an amplified HMBC spectrum (Figure S8) in supplementary material to illustrate this question. In Figure S8, there were strong correlations of H (¦Ä 3.78, 3H, s) with C-6' (151.6), H (¦Ä 3.90, 3H, s) with C-7' (154.2), H (¦Ä 3.86, 3H, s) with C-4 (154.4) and H (¦Ä 3.99, 3H, s) with C-7 (149.2). The results allowed four methoxy groups (methoxy protons at ¦Ä 3.78, ¦Ä 3.90, ¦Ä 3.86, ¦Ä 3.99) to be attached to C-6', C-7', C-4 and C-7, respectively.
ͼʡÂÔÁË
ÖмäÎÒÏë±í´ï£¬HMBCÆ×Öм×Ñõ»ùµÄÇâÓëÄĸöCÓÐÏà¹Ø£¬¾Í˵Ã÷¼×Ñõ»ùÁ¬½ÓÔÚÄĸöCÉÏ£¬¼ä¸ô3¸ö¼üµÄÏà¹Ø×îÇ¿¡£

[ Last edited by moonface551 on 2012-12-18 at 15:35 ]
»Ø¸´´ËÂ¥

» ²ÂÄãϲ»¶

» ±¾Ö÷ÌâÏà¹Ø¼ÛÖµÌùÍÆ¼ö£¬¶ÔÄúͬÑùÓаïÖú:

ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

moonface551

¾èÖú¹ó±ö (СÓÐÃûÆø)

ºÃµÄ£¬ÎÒÈ¡ÏûÇóÖú£¬Ð»Ð»´ó¼Ò
6Â¥2012-12-18 21:22:30
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
²é¿´È«²¿ 6 ¸ö»Ø´ð

moonface551

¾èÖú¹ó±ö (СÓÐÃûÆø)

ÔõôûÈËÄØ£¬¶¥Ò»ÏÂ
2Â¥2012-12-18 15:55:05
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

nono2009

³¬¼¶°æÖ÷ (ÎÄѧ̩¶·)

No gains, no pains.

ÓÅÐãÇø³¤ÓÅÐãÇø³¤ÓÅÐãÇø³¤ÓÅÐãÇø³¤ÓÅÐã°æÖ÷

¡¾´ð°¸¡¿Ó¦Öú»ØÌû

¸Ðл²ÎÓ룬ӦÖúÖ¸Êý +1
ÄãÕâ¸öÎÊÌâ̫רҵÁË£¬µ½Ïà¹Ø×¨Òµ°æÈ¥½»Á÷¸üºÏÊÊ¡£ÕâÀïÖ÷Òª½»Á÷Ͷ¸åÖеĹ²ÐÔÎÊÌâ
4Â¥2012-12-18 18:59:37
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

googleuboy

ľ³æ (ÖªÃû×÷¼Ò)

¡¾´ð°¸¡¿Ó¦Öú»ØÌû

¸Ðл²ÎÓ룬ӦÖúÖ¸Êý +1
̫רҵÁË£¬ÉÙ²¿·ÖÈ˲Ŷ®ÄãµÄ
UUUUUUUUUUUUUUU
5Â¥2012-12-18 19:41:14
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
×î¾ßÈËÆøÈÈÌûÍÆ¼ö [²é¿´È«²¿] ×÷Õß »Ø/¿´ ×îºó·¢±í
[»ù½ðÉêÇë] ͶƱ:  ÓжàÉÙÈËÊǽñÌì²éϵͳ֪µÀ½á¹ûµÄ£¿ +12 °®¿´ÊéµÄ¿ÉÀÖ 2026-08-26 14/700 2026-08-26 12:49 by coolysnow
[»ù½ðÉêÇë] Ϊʲô¹ú×ÔÈ»²»ÄÜÖ±½Ó¹«²¼ +3 bjdxyxy 2026-08-26 3/150 2026-08-26 12:48 by С³óÓã°®¶ÁÊé
[»ù½ðÉêÇë] ÄÄλ¸ßÈËÖÐÁË£¬°Ñ²éѯµ½µÄ½ØÍ¼Ìù³öÀ´ÈÃÎÒ¿´¿´£¬ÈÃÎÒ³¤³¤¼ûʶ +3 yuleib84 2026-08-26 3/150 2026-08-26 12:34 by xiacongxu
[»ù½ðÉêÇë] ¿ÆÑй¶ùÌ«ÄÑÁË +21 ÎÒ4´ó°×²Ë 2026-08-20 22/1100 2026-08-26 11:29 by nlgza
[»ù½ðÉêÇë] ¹úºÏÀïÃæÄÜ¿´µ½ÁË +7 Ò»»³Ü°Çï 2026-08-26 7/350 2026-08-26 11:23 by zhaosm1982
[»ù½ðÉêÇë] ϵͳ½ø²»È¥ +4 yanglien 2026-08-26 5/250 2026-08-26 11:10 by wenfengw83
[»ù½ðÉêÇë] 2026ÄêµÄ¹ú¼ÒÉç¿Æ»ù½ðÏîĿͨѶÆÀÉóµÄйæÔòÓëж¯Ïò¡¢ÐÂÌôÕ½ +6 process2012 2026-08-23 8/400 2026-08-26 11:03 by zjlp
[»ù½ðÉêÇë] ¹úºÏ¿É²éÁË +3 paperzjh 2026-08-26 3/150 2026-08-26 10:41 by LemmonTr
[»ù½ðÉêÇë] ½ñÌìÎñί»á¿ªÍêÁË£¬Ã÷Ìì³ö½á¹ûÂð +19 angus9576 2026-08-25 23/1150 2026-08-26 10:03 by zp519
[Ö°³¡ÈËÉú] ѧÉúײ¼û¸¨µ¼Ô±ËÍÍâÂô£¬µÚ¶þÌìÈ«°à¶¼³ÁĬÁË +3 ¾¨ÓãÈÚ½ð_Õã½­_É 2026-08-22 3/150 2026-08-26 09:01 by zzuzxg
[»ù½ðÉêÇë] 2026Äê8ÔÂ25ÈÕ¹ú×ÔÈ»·Å°ñǰͻȻÊÕµ½ÁÐÈëÆÀÉóר¼ÒÓʼþ£¬ÓйØÏµÂ𣿠+24 ľˮ˼¶¹ 2026-08-25 27/1350 2026-08-26 08:26 by yanchen918
[»ù½ðÉêÇë] ÔÚ¼á±ù»¹¸Ç×ű±º£µÄʱºò£¬ÎÒ¿´µ½ÁËÅ­·ÅµÄ÷»¨¡£ (½ð±Ò+10) +6 ziyangfang 2026-08-25 9/450 2026-08-25 20:26 by huagongfeihu
[»ù½ðÉêÇë] Ã÷ÌìÓ¦¸Ã¿É²éÁË£¡£¿ +6 chengyan1220 2026-08-23 6/300 2026-08-25 19:45 by zfd97
[»ù½ðÉêÇë] ÓÐûÓдóÉñ°ïÎÒ¿´¿´»ù½ð´úÂë 28+4 1234567wang 2026-08-24 10/500 2026-08-25 19:15 by lfy8008
[»ù½ðÉêÇë] ÎÒÃæÉÏÍêµ°ÁË +13 ÇÒÌý»¢Ð¥ 2026-08-20 14/700 2026-08-25 09:10 by mrkang
[»ù½ðÉêÇë] ½¨Òé»ù½ð·¢²¼Ìáǰ¸ø³öÃ÷È·µÄʱ¼äµã +13 kulium 2026-08-21 16/800 2026-08-24 16:27 by superceng
[»ù½ðÉêÇë] ÈÃÎÒÖÐÒ»¸öÃæÉϰɣ¡ +13 ´óƼ1987 2026-08-20 16/800 2026-08-24 10:23 by ̫ɵÁË
[»ù½ðÉêÇë] ʱ¼ä´ÁÓÖ±äÁË +13 wuchongjun 2026-08-20 19/950 2026-08-21 17:21 by ×Ïɼ´¼
[»ù½ðÉêÇë] ½ñÌì·Å°ñûϷÁ衃 +9 yuleib84 2026-08-19 11/550 2026-08-21 10:06 by gltch
[»ù½ðÉêÇë] »ù½ð°¡»ù½ð +4 longfie172 2026-08-20 4/200 2026-08-21 08:58 by mark mao
ÐÅÏ¢Ìáʾ
ÇëÌî´¦ÀíÒâ¼û