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carrystar

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0) 9,  10d:  Allgem. Vorschrift: 5.lg  (0.21 mol) Mg-Spane und 50ml absol. Ether envarmt man auf
RiickfluRtemp. und  tropft  in  1.5-2h  unter  kraftigem Riihren eine  Losung  aus  8g (0.051 mol)
p-Methoxybenzylchlorid in  50ml  Ether  zu  (ggf.  setzt man einige ml  der  Losung zu, damit dic
Reaktion anspringt!). Nach  dem Abkiihlen wird  das Grignard-Reagens,  dessen Bildung mit dem
GiImun-Testl6) kontrollierbar ist,  vom  iiberschiissigen Mg  dekantiert  und tropfenweise mit  der
Losung von 0.025 mol des jeweiligen Chinolinons 6,7 in 50ml Ether versetzt. Dabei ist das unter a)
beschriebene Farbspiel  zu  beobachten und somit die erforderliche Ketonmenge kontrollierbar.
Schliealich versetzt man das Reaktionsgemisch mit 50ml Ether, riihrt noch 30min unter Erwarmen
weiter und arbeitet wie unter a) auf. Die Rohprodukte werden in wenig Ethanol (ggf. auch Aceton)
gelost und zur Kristallisation mindestens 15  h  im Kiihlschrank  aufbewahrt. Ausb., Rf-Werte, Schmp.
und Analysen s. Tab. 1.

ºóÃæµÄÄÚÈÝ£¬Ã¿·­ÒëÒ»¾ä£¬×·¼Ó6¸ö½ð±Ò¡£

[ Last edited by carrystar on 2010-10-29 at 09:37 ]

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huzl

Òø³æ (ÕýʽдÊÖ)

carrystar(½ð±Ò+40, ·­ÒëEPI+1):лл£¡ 2010-10-30 07:57:53
General procedure: 5.1g (0.21mol) of Mg chips and 50ml of absolute ether are heated under reflux, to which a solution of 8g (0.051mol) of p-methoxybenzyl chloride in 50ml of ether is added drop by drop in 1.5-2h with rigorous stirring. ( optionally several ml of the solution are added, so that the reaction is initiated.
---- unfinished
2Â¥2010-10-29 16:02:24
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

huzl

Òø³æ (ÕýʽдÊÖ)

After the solution is cooled, the Grignard reagent, whose formation can be monitored with the Gilman test, is separated from the excess Mg and treated drop by drop with the solution of 0.025 mol of each of the quinolinone 6,7 in 50ml ether.
3Â¥2010-10-29 16:10:51
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

huzl

Òø³æ (ÕýʽдÊÖ)

Thus the color change( Farbspiel?) described in (a) can be observed and therefore the required amount of the ketone is controllable. Finally the reaction mixture is treated with 50ml of ether, stirred for an additional 30 min. with heating and is worked up as (a). The crude products are dissolved in a little ethanol ( optionally acetone) and kept in a cooling tank for at least 15h to crystallization. Yield, Rf-value m.p., and analyses, see Tab.1.


complete
4Â¥2010-10-29 17:14:36
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