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公开(公告)号:US06888008B2
公开(公告)日:2005-05-03
申请号:US09810458
申请日:2001-03-16
申请人: Raymond Vincent Heavon Jones , Alan John Whitton , Jennifer Ann White , David John Ritchie , Robin Fieldhouse , Kirstin Maccormick , Logan Thomson Nisbet , Paul Richard Evans , Colin John Bennie
发明人: Raymond Vincent Heavon Jones , Alan John Whitton , Jennifer Ann White , David John Ritchie , Robin Fieldhouse , Kirstin Maccormick , Logan Thomson Nisbet , Paul Richard Evans , Colin John Bennie
IPC分类号: B01J31/28 , C07B61/00 , C07D311/76 , C07D311/74
CPC分类号: C07D311/76
摘要: A process for the preparation of 3-isochromanone which comprises contacting an o-xylene-α,α′-dihalide with carbon monoxide, in the presence of a catalyst and a hindered amine base in a liquid medium comprising water and a tertiary alcohol.
摘要翻译: 一种制备3-异色满酮的方法,其包括使邻二甲苯-α,α'-二卤化物与一氧化碳在催化剂和受阻胺碱存在下在包含水和叔醇的液体介质中接触。
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公开(公告)号:US07491834B2
公开(公告)日:2009-02-17
申请号:US10513564
申请日:2003-04-08
申请人: Raymond Vincent Heavon Jones , Alan John Whitton , Colin John Bennie , David John Ritchie , Pascal Bugnon
发明人: Raymond Vincent Heavon Jones , Alan John Whitton , Colin John Bennie , David John Ritchie , Pascal Bugnon
IPC分类号: C07D311/00
CPC分类号: C07D311/76
摘要: 3-Isochromanone is prepared by partially chlorinating o-tolylacetic acid with sulphuryl chloride or chlorine gas in an inert organic solvent in the presence of a free radical initiator. The 2-chloromethylphenylacetic acid first obtained is converted to 3-isochromanone by treatment with a base and separated from unreacted o-tolylacetic acid, which is in the form of a salt, by a phase separation technique. The separated o-tolylacetic acid salt is converted to o-tolylacetic acid by controlled acidification and the o-tolylacetic acid is extracted for re-use. The invention reduces the formation of unwanted, over-chlorinated by-products and leads to a more efficient process.
摘要翻译: 通过在惰性有机溶剂中,在自由基引发剂的存在下,用硫酰氯或氯气部分氯化邻甲苯乙酸来制备3-异色满酮。 首先将得到的2-氯甲基苯乙酸通过用碱处理转化为3-异色满酮,并通过相分离技术从盐形式的未反应的邻甲苯乙酸中分离出来。 通过控制酸化将分离的邻甲苯基乙酸盐转化为邻甲苯乙酸,并将邻甲苯基乙酸萃取再次使用。 本发明减少了不需要的过氯化副产物的形成并导致更有效的方法。
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