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Copyright ¨Ï2008 .Y
À¯±âÈÇнÇÇè
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Content
- ¸ñÂ÷ -
Introduction
Reagent
Experimental principle
Mechanism
Apparatus & reagent
Experimental method
Caution
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Experimental object
- ½ÇÇè¸ñÇ¥ -
Indolium salt formation(saltification)Àº 5-Substituted-2-methylene-1,3,3-trimethylindolineÀ» ÅëÇؼ ethanol·Î Àç°áÁ¤À» ¾ò´Â ½ÇÇèÀÌ´Ù.
À¯±â ºÐÀÚ Àε¹¸° (Indoline) ¿°·á¸¦ »ç¿ëÇÑ
ÀüÇØÁúÀº À̿¼º ¾×ä (an ionic fluid)·Î ¸¹Àº
À̿µé·Î ÀÌ·ç¾îÁ® ÀÖ°í ¶§·Î´Â ¿ëÇØÁ¡ (melting temperatures)À» ³·Ãß´Â ¼Ò±ÝÀ¸·Î ÀÌ·ç¾îÁ® ÀÖ´Ù.
À̿¼º ¾×ü´Â Çöó½ºÆ½ Àü±Ø (plastic electrodes)°ú ÇÔ²² »ç¿ëµÇ¾î žçÀüÁöÀÇ È¿À²À» ³ôÀÏ »Ó ¾Æ´Ï¶ó Á¢°í ÈÙ ¼ö ÀÖÀ¸¸ç, ±×·¯¹Ç·Î ¿Ê, ÀÚµ¿Â÷ Ä¿¹ö, ±âŸ¿¡ Á÷Á¶ÇÏ¿© »ç¿ëÇÒ ¼ö ÀÖ´Ù.
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Reagent
- ½Ã¾à -
Fischer¡¯s base (M.W. = 173.26)
or 5-Chloro-Fischer¡¯s base (M.W.= 207.7) -` 1eq
70%¡¦(»ý·«)
|
l principle
- ½ÇÇè¿ø¸® -
Indole chemical structure
Fischer Indole reaction
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Experimental principle
- ½ÇÇè¿ø¸® -
Experimental mechanism
2Áß°áÇÕÀÇ Electrophilic additionÀÌ ÀϾ °¡Àå ¾ÈÁ¤ÇÑ 3Â÷carbocationÀÌ Çü¼º.
NÀÇ ºñ°øÀ¯ ÀüÀÚ°¡ À̵¿ÇÏ¿©, Indole salt°¡ »ý¼º
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Apparatus & reagent
- ½ÇÇè±â±¸ & ½Ã¾à -
RB(Round bottom flask)
ºñÄ¿
ºä·¿
Magnetic Bar
Àú¿ï
ÇÇÆê
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Experimental method
- ½ÇÇè¹æ¹ý -
5-Substituted-2-methylene-1,3,3-trimethylindoline (2g)¿Í diethyl ether¸¦ 250ml RB¿¡ adding
70% perchoric acid solution (2eq)À» õõÈ÷ dropwise
5h Á¤µµ stirring (RT)
Èò»ö ħÀüÀÌ »ý±â¸é filtration ÈÄ ether·Î washing
Ethanol ·Î Àç°áÁ¤
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Caution
- ÁÖÀÇ»çÇ× -
°ú¿°¼Ò»ê(HClO4)Àº Æø¹ß¼ºÀÌ ÀÖÀ¸¸ç ¸Å¿ì À¯µ¶ÇÑ ¹°ÁúÀÌ°í ÇÇºÎ¿Í ´«¿¡ ¼Õ»óÀ» ÁÙ ¼ö ÀÖÀ¸¹Ç·Î Á¶½ÉÇÏ¿©¼ ´Ù·é´Ù.
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