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qyl541886

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[交流] 有机合成英语帮忙翻译其中两句

This methodology is mild and efficient and is compatible with several functional groups other than the alcohol.Substrates with methoxy-substituted aromatic rings are subjected to the TEMPO/TCCA oxidation, but surprisingly the reaction affords only the corresponding aldehydes (Table 1, entries 7 and 8). Unexpectedly, this
procedure failed in the oxidations of unsaturated alcoholsas well. Contrary to what was observed carrying out the oxidation in the absence of water, the treatment of
unsaturated alcohols with 2 equiv of trichloroisocyanuricacid and catalytic TEMPO, under the present conditions,proceeded to the corresponding carboxylic acid and to the contemporary addition to the double bond. The oxidation of trans-cinnamic alcohol furnished in fact (2RS,3SR)-2,3-dichloropropionic acid. The amount of chlorinationreaction is diminished operating with equimolar amounts
of TCCA, but in this case the rate of the reaction is very
reduced. To determine if this behavior was general for
the double bond, we carried out the reaction with (E)-
1,1-diethoxy-3-phenyl-2-propene under the same condi-
tions. After complete conversion of the alkene, (2RS,3SR)-
1,1-diethoxy-2,3-dichloro-3-phenylpropane was obtained
quantitatively.

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1楼 2011-02-11 22:04:55

已阅回复此楼关注TA 给TA发消息送TA红花 TA的回帖

爱与雨下

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qyl541886(金币+1, 翻译EPI+1): 2011-02-14 22:02:45

引用回帖:

Originally posted by qyl541886 at 2011-02-11 22:06:51:
carrying out the oxidation in the absence of water 是observed 还是不是，?
present conditions是“现在的条件”么？

是
present conditions是指文献中的现有的条件