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liuxiang8868

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In a CEM microwave vial with a stir-bar (optional), the
nitroaniline (0.36 mmol), carboxylic acid (1.03 mL,
0.35 M), and SnCl2Æ2H2O (3.0 equiv) were combined
and heated at 130 C (125 W, 1.0 min ramp time) for
5 min. After cooling, the reaction mixture was diluted
with water (4 mL) and neutralized with 50% aq NaOH
(pH = 7.0 ¡À 0.5). It was extracted with ethyl acetate
(3 ¡¤ 4 mL) and the combined organic phases were dried
(Na2SO4), filtered and evaporated under reduced pressure.
The crude product was analyzed by HPLC/MS/
CLND and purified by passing through a plug of silica
gel (500 mg prepacked columns) using 30 mL of ethyl
acetate. Compounds with purity below 95% were further
purified using the ISCO CombiFlash 16sqx with a gradient
of either 5¨C100% EtOAc¨Chexanes or 0¨C20% DCM¨C
MeOH (5, 13, and 21).

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peak1928

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2Â¥2009-04-24 11:08:32
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iamwolfling

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liuxiang8868(½ð±Ò+1,VIP+0): 5-5 17:06
zap65535(½ð±Ò+2,VIP+0):²¹·¢ 12-23 20:28
ÔÚ´øÓнÁ°è×ÓµÄCEM ΢²¨Ð¡Æ¿ÖУ¬¼ÓÈë
Ïõ»ù±½°·£º0.36mmol
ôÈËá £º£¬0.35M £¬1.03ml
SnCl2 £º?
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3Â¥2009-04-24 22:49:59
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shixuemin

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4Â¥2009-04-24 22:58:31
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