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juven2008

金虫 (小有名气)

[交流] 求苯甲醛上碘的方法(截至2008年9月25日)

只是苯甲醛,在醛基间位上碘,请各位高人指点,有参考文献的希望告诉一下

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中国加油
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sibianjing

木虫 (正式写手)


juven2008(金币+1,VIP+0):同样感谢你的帮助
先在醛基对位加定位基团,在引入I后,将对位基团去掉,我学有机化学的时候 经常联系,反应机理 过程记不清了。
3楼2008-09-20 10:55:38
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luobogengen

铜虫 (小有名气)

★ ★ ★ ★
juven2008(金币+4,VIP+0):非常感谢你的帮助
1
Synthesis,  (7), 1195-1199; 2006
CASREACT
Abstract

Deactivated arenes were mono- or diiodinated with strong electrophilic I+ reagents, which were prepd. from NaIO4 and either I2 or KI in concd. H2SO4 (?5 wt%).  In general a small excess (1.1/1.5 equiv) of the dark brown iodinating soln. was used (for nitrobenzene 2 equiv. were required).  The iodinations were conducted at 25-30?within 1-2 h using either a 'direct' or an 'inverse' method of arom. iodination to give mono- or diiodinated pure products in 31-91% optimized yields.  
2
Journal of Organic Chemistry  (2002),  67(24),  8622-8624.
Tetramethylammonium Dichloroiodate: An Efficient and Environmentally Friendly Iodination Reagent for Aromatic Compounds under Mild and Solvent-Free Conditions.     Hajipour, Abdol R.; Arbabian, Marty; Ruoho, Arnold E.    Department of Pharmacology, Medical School,  University of Wisconsin,  Madison,  WI,  USA.    Journal of Organic Chemistry  (2002),  67(24),  8622-8624.  Publisher: American Chemical Society,  CODEN: JOCEAH  ISSN: 0022-3263.  Journal  written in English.    CAN 138:89526    AN 2002:841301    CAPLUS  

Abstract

Tetramethylammonium dichloroiodate as a mild and efficient iodination reagent was prepd.  Iodination of different arom. compds. with this reagent takes place fast and with high yields under solvent-free conditions.  
92%的收率
2楼2008-09-20 10:51:49
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