²é¿´: 1169  |  »Ø¸´: 3
±¾Ìû²úÉú 1 ¸ö ·­ÒëEPI £¬µã»÷ÕâÀï½øÐв鿴
µ±Ç°Ö»ÏÔʾÂú×ãÖ¸¶¨Ìõ¼þµÄ»ØÌû£¬µã»÷ÕâÀï²é¿´±¾»°ÌâµÄËùÓлØÌû

houlu666

Òø³æ (СÓÐÃûÆø)


[½»Á÷] °ïæÐÞ¸ÄÒ»¶Î·­Ò룡лл£¡

in contrast to the formation of 1,4- dihydro compounds from reduction of nicotinamide adenine dinucleotide(NAD©€) in biological systems, chemical reduction of pyridinium salts gives different reduction products depending on the reducing agents and substrates.However, the mechanism of the reductions has not been fully understood. Therefore, it would be of interest to study the reduction of N-arylpyridinium salts,in which aryl groups with various substituents differing in electronic effect can be easily incorporated,and to compare their reduction  products.  It  is  also  known  that  some  of 1,2-dihydroquinolines  isomerize  to  the  corresponding 1,4-isomers. The  study  on  the  isomerization  of  N-aryldihydropyridines is expected to give valuable informations on the factors underlying the process.
Óë´ËÏà·´µÄÊÇÔÚÉúÎïϵͳÖÐ1,4Ò»¶þÇâÑÌõ£°·»¯ºÏÎïÀ´×ÔÏÙàÑßʶþºËÜÕËᣨNAD©€£©µÄ»¹Ô­£¬ßÁà¤ÑεĻ¯Ñ§»¹Ô­µÃ³ö²»Í¬µÄ»¹Ô­²úÎÕâÊǸù¾Ý»¹Ô­¼ÁºÍ»ù°å¶ø¶¨¡£È»¶ø£¬ÕâÒ»»úÖÆ»¹Ã»Óеõ½ÍêÈ«Àí½â¡£Òò´Ë£¬Õ⽫ÓÐÐËȤÑо¿N ¨C Íé»ùßÁà¤ÑεĻ¹Ô­£¬ÕâÓ벻ͬµÄµç×ÓЧӦÔÚ¸÷ÖÖÈ¡´ú·¼»ùÒ²ºÜÈÝÒ×ÕûºÏ£¬'²¢±È½ÏÆä»¹Ô­²úÎï¡£ÕâÒ²ÊÇÖÚËùÖÜÖª£¬1,2- dihydroquinolinesһЩÒì¹¹ÏàÓ¦µÄ1,4-Òì¹¹Ìå¡£¶ÔN ¨C Íé»ùßÁà¤Òì¹¹»¯Ñо¿Ô¤¼Æ·ÅÆúÕâÒ»½ø³ÌµÄ»ù±¾ÒòËØ£¬ÓмÛÖµµÄÐÅÏ¢¡£

» ²ÂÄãϲ»¶

» ÇÀ½ð±ÒÀ²£¡»ØÌû¾Í¿ÉÒԵõ½:

²é¿´È«²¿É¢½ðÌù

ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
houlu666(½ð±Ò+2, ·­ÒëEPI+1): 2011-02-28 12:12:29
in contrast to the formation of 1,4- dihydro compounds from reduction of nicotinamide adenine dinucleotide(NAD©€) in biological systems, chemical reduction of pyridinium salts gives different reduction products depending on the reducing agents and substrates.However, the mechanism of the reductions has not been fully understood. Therefore, it would be of interest to study the reduction of N-arylpyridinium salts,in which aryl groups with various substituents differing in electronic effect can be easily incorporated,and to compare their reduction  products.  It  is  also  known  that  some  of 1,2-dihydroquinolines  isomerize  to  the  corresponding 1,4-isomers. The  study  on  the  isomerization  of  N-aryldihydropyridines is expected to give valuable informations on the factors underlying the process.
ÓëÉúÎïϵͳÖÐÏÙàÑßʶþºËÜÕËᣨNAD©€£©µÄ»¹Ô­Éú³É1,4Ò»¶þÇâÑÌõ£°·»¯ºÏÎïÏà·´£¬ßÁà¤ÑεĻ¯Ñ§»¹Ô­µÃµ½²»Í¬µÄ»¹Ô­²úÎÕâÒÀ»¹Ô­¼ÁºÍµ×Îï¶ø¶¨¡£È»¶ø£¬ÕâÒ»»¹Ô­»úÀí»¹Ã»Óеõ½ÍêÈ«Á˽⡣Òò´Ë£¬Ñо¿¾ßÓв»Í¬µç×ÓЧӦµÄ¸÷ÖÖÈ¡´ú·¼»ùÔÚN ¨C Íé»ùßÁà¤ÑεĻ¹Ô­ÖеÄЭͬЧӦ²¢±È½ÏÆä¶ÔÓ¦µÄ»¹Ô­²úÎÕ⽫ÊÇÒ»¸öÁîÈ˸ÐÐËȤµÄÑо¿¡£ÖÚËùÖÜÖª£¬Ò»Ð©1,2- ¶þÇâ¿üÄþÒì¹¹Ìå¿ÉÒ칹ΪÏàÓ¦µÄ1,4-Òì¹¹Ìå¡£¶ÔN ¨C ·¼»ù¶þÇâßÁà¤Òì¹¹»¯Ñо¿ÓÐÍû»ñµÃÓ°ÏìÒì¹¹»¯¹ý³ÌµÄ»ù±¾ÒòËØµÄÓмÛÖµµÄÐÅÏ¢¡£
3Â¥2011-02-28 11:25:50
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
²é¿´È«²¿ 4 ¸ö»Ø´ð
houlu666(½ð±Ò+2): 2011-02-28 12:12:35
ÔÚÉúÎïϵͳÖÐ1,4Ò»¶þÇâÑÌõ£°·»¯ºÏÎïÀ´×ÔÏÙàÑßʶþºËÜÕËᣨNAD©€£©µÄ»¹Ô­£¬Óë´ËÏà·´µÄÊÇ£¬¸ù¾Ý»¹Ô­¼ÁºÍµ×Îﲻͬ£¬ßÁà¤ÑεĻ¯Ñ§»¹Ô­µÃ³ö²»Í¬µÄ»¹Ô­²úÎȻ¶ø£¬ÕâÒ»»úÖÆ»¹Ã»Óеõ½ÍêÈ«Àí½â¡£Òò´Ë£¬ÓбØÒªÑо¿N ¨C Íé»ùßÁà¤ÑεĻ¹Ô­£¬ÔÚÕâÖÖ·´Ó¦ÖУ¬¾ßÓв»Í¬µç×ÓЧӦµÄ¸÷ÖÖÈ¡´ú·¼»ùÒ²ºÜÈÝÒ×½øÐÐÕûºÏ£¬'²¢¶ÔÆä»¹Ô­²úÎï½øÐбȽϡ£ÖÚËùÖÜÖª£¬1,2-¶þÇâà­ßø¿ÉÒÔÒ칹ΪÏàÓ¦µÄ1,4-Òì¹¹Ìå¡£¶ÔN ¨C Íé»ùßÁà¤Òì¹¹»¯µÄÑо¿½«Îª½ÒʾÕâÒ»½ø³ÌDZÔÚµÄÒòËØÌṩÓмÛÖµµÄÐÅÏ¢¡£
2Â¥2011-02-28 11:04:39
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
ÓëÉúÎïϵͳÖÐÏÙàÑßʶþºËÜÕËᣨNAD©€£©»¹Ô­Éú³É1,4Ò»¶þÇâÑÌõ£°·»¯ºÏÎïÏà·´£¬ßÁà¤ÑεĻ¯Ñ§»¹Ô­µÃµ½²»Í¬µÄ»¹Ô­²úÎÕâÒÀ»¹Ô­¼ÁºÍµ×Îï¶ø¶¨¡£È»¶ø£¬ÕâÒ»»¹Ô­»úÀí»¹Ã»Óеõ½ÍêÈ«Á˽⡣Òò´Ë£¬Ñо¿¾ßÓв»Í¬µç×ÓЧӦµÄ¸÷ÖÖÈ¡´ú·¼»ùÔÚN ¨C Íé»ùßÁà¤ÑεĻ¹Ô­ÖеÄЭͬЧӦ²¢±È½ÏÆä¶ÔÓ¦µÄ»¹Ô­²úÎÕ⽫ÊÇÒ»¸öÁîÈ˸ÐÐËȤµÄÑо¿¡£ÖÚËùÖÜÖª£¬Ò»Ð©1,2- ¶þÇâ¿üÄþÒì¹¹Ìå¿ÉÒ칹ΪÏàÓ¦µÄ1,4-Òì¹¹Ìå¡£¶ÔN ¨C ·¼»ù¶þÇâßÁà¤Òì¹¹»¯Ñо¿ÓÐÍû»ñµÃÓ°ÏìÒì¹¹»¯¹ý³ÌµÄ»ù±¾ÒòËØµÄÓмÛÖµµÄÐÅÏ¢¡£
4Â¥2011-02-28 11:27:55
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
×î¾ßÈËÆøÈÈÌûÍÆ¼ö [²é¿´È«²¿] ×÷Õß »Ø/¿´ ×îºó·¢±í
[¹«Åɳö¹ú] ÊÛSCIÒ»ÇøT0PÎÄÕ£¬ÎÒ:8.O55.1.O.54,¿ÆÄ¿È«,¿ÉÊ®¼± +3 Aj1rhIDL5ixY 2026-09-14 3/150 2026-09-15 19:59 by CgyNCDVNhGVg
[¿¼ÑÐ] ÊÛSCIÒ»ÇøÎÄÕ£¬ÎÒ:8O5.5.1.O5.4,¿ÆÄ¿È«,¿ÉÙ¤¼± +3 0pYnUiPDfdnk 2026-09-14 3/150 2026-09-15 19:35 by CgyNCDVNhGVg
[˶²©¼ÒÔ°] ÊÛSCIÒ»ÇøÎÄÕ£¬ÎÒ:8.O.55.1.O.54,¿ÆÄ¿ÆëÈ«,¿ÉÙ¤¼± +3 40ms4Wlo4umh 2026-09-14 3/150 2026-09-15 18:59 by CgyNCDVNhGVg
[ÕÒ¹¤×÷] ÊÛSCIÒ»ÇøÎÄÕ£¬ÎÒ:8.O.55.1.O.54,¿ÆÄ¿ÆëÈ«,¿ÉÙ¤¼± +3 23jxep3nCNZb 2026-09-14 3/150 2026-09-15 18:47 by CgyNCDVNhGVg
[ÕÒ¹¤×÷] ÊÛSCIÒ»ÇøT0PÎÄÕ£¬ÎÒ:8.O.55.1.O.54,¿ÆÄ¿ÆëÈ«,¿É+¼± +3 6F5UbRU2I5hL 2026-09-14 4/200 2026-09-15 17:35 by CgyNCDVNhGVg
[¿¼ÑÐ] ÊÛSCIÎÄÕ£¬ÎÒ:8O5.5.1.O.54,¿ÆÄ¿ÆëÈ«,¿É+¼± +4 6F5UbRU2I5hL 2026-09-14 4/200 2026-09-15 17:23 by CgyNCDVNhGVg
[¿¼²©] ÊÛSCIÒ»ÇøÎÄÕ£¬ÎÒ:8O5.5.1.O5.4,¿ÆÄ¿È«,¿ÉÙ¤¼± +7 s3fFTmArrBt6 2026-09-14 7/350 2026-09-15 16:23 by CgyNCDVNhGVg
[ÕÒ¹¤×÷] ÊÛSCIÒ»ÇøT0PÎÄÕ£¬ÎÒ:8.O.55.1.O54,¿ÆÄ¿È«,¿ÉÙ¤¼± +3 s3fFTmArrBt6 2026-09-13 3/150 2026-09-15 15:50 by CgyNCDVNhGVg
[¹«Åɳö¹ú] ÊÛSCIÒ»ÇøT0PÎÄÕ£¬ÎÒ:8O.55.1.O.5.4,¿ÆÄ¿ÆëÈ«,¿É+¼± +4 3n8v2C8RimXI 2026-09-13 5/250 2026-09-15 14:58 by CgyNCDVNhGVg
[˶²©¼ÒÔ°] ÊÛSCI-T0PÎÄÕ£¬ÎÒ:8O.5.5.1.O.54,¿ÆÄ¿ÆëÈ«,¿É+¼± +4 3n8v2C8RimXI 2026-09-13 4/200 2026-09-15 14:34 by VMDqgnlKimtZ
[˶²©¼ÒÔ°] ÊÛSCIÒ»ÇøT0PÎÄÕ£¬ÎÒ:8.O.55.1.O54,¿ÆÄ¿È«,¿ÉÙ¤¼± +4 QUjhNVAcOSff 2026-09-13 4/200 2026-09-15 14:14 by VMDqgnlKimtZ
[¹«Åɳö¹ú] ÊÛSCIÒ»ÇøT0PÎÄÕ£¬ÎÒ:8.O55.1.O.54,¿ÆÄ¿È«,¿ÉÊ®¼± +7 QUjhNVAcOSff 2026-09-13 9/450 2026-09-15 14:10 by VMDqgnlKimtZ
[½Ìʦ֮¼Ò] ÊÛSCIÒ»ÇøT0PÎÄÕ£¬ÎÒ:8O.55.1.O.54,¿ÆÄ¿È«,¿ÉÙ¤¼± +4 6F5UbRU2I5hL 2026-09-14 4/200 2026-09-15 07:50 by C79jjtjAKjEn
[²©ºóÖ®¼Ò] ÊÛSCIÒ»ÇøT0PÎÄÕ£¬ÎÒ:8.O55.1.O.54,¿ÆÄ¿È«,¿ÉÊ®¼± +3 s3fFTmArrBt6 2026-09-14 3/150 2026-09-15 07:34 by C79jjtjAKjEn
[½Ìʦ֮¼Ò] ÊÛSCIÒ»ÇøÎÄÕ£¬ÎÒ:8.O.55.1.O.54,¿ÆÄ¿ÆëÈ«,¿ÉÙ¤¼± +4 s3fFTmArrBt6 2026-09-13 4/200 2026-09-15 06:50 by 5BDX0d0WFp7t
[¿¼ÑÐ] ÊÛSCIÒ»ÇøT0PÎÄÕ£¬ÎÒ:8.O.55.1.O.5.4,¿ÆÄ¿È«,¿É+¼± +4 LwdutQ8HoqWP 2026-09-13 4/200 2026-09-15 06:14 by 5BDX0d0WFp7t
[ÕÒ¹¤×÷] ÊÛSCIÒ»ÇøT0PÎÄÕ£¬ÎÒ:8.O.55.1.O54,¿ÆÄ¿È«,¿ÉÙ¤¼± +3 3n8v2C8RimXI 2026-09-13 4/200 2026-09-15 06:01 by 5BDX0d0WFp7t
[ÕÒ¹¤×÷] ÊÛSCIÒ»ÇøT0PÎÄÕ£¬ÎÒ:8.O.55.1.O.5.4,¿ÆÄ¿È«,¿É+¼± +6 QUjhNVAcOSff 2026-09-13 7/350 2026-09-15 05:22 by 5BDX0d0WFp7t
[½Ìʦ֮¼Ò] ÊÛSCIÒ»ÇøÎÄÕ£¬ÎÒ:8.O.55.1.O.54,¿ÆÄ¿ÆëÈ«,¿ÉÙ¤¼± +3 LwdutQ8HoqWP 2026-09-13 4/200 2026-09-14 16:13 by Aj1rhIDL5ixY
[¿¼²©] Î÷±±¹¤Òµ´óѧ²ÄÁÏѧԺµç»¯Ñ§´«¸ÐÓë´ß»¯¿ÎÌâ×éÕÐÊÕ2027ÄêÍÆÃâÑо¿Éú¡¢²©Ê¿Éú¡¢²©Ê¿ºó +3 Âí·½Ô° 2026-09-10 4/200 2026-09-14 09:29 by ChemÕÅzz
ÐÅÏ¢Ìáʾ
ÇëÌî´¦ÀíÒâ¼û