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everdevil

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we have developed a Rh(III) catalyzed oxidative isoquinolone synthesis using a transient 5-membered rhodacycle accessed from ortho C - H/N - H activation.
We found that heterocycles are well tolerated in the reaction allowing access to a number of unique molecular scaffolds. Additionally, unsymmetrical alkynes are tolerated in high yield and high regioselective with high functional group tolerance. The mechanism of the reaction was probed to find that C - H activation is the turnover-limiting step. A series of competition experiments shed light on this mech-anism, suggesting alkyne insertion is largely governed by steric factors and alkyne coordination plays a central role in product selectivity.


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AnnF

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everdevil: 金币+1, 翻译EPI+1, ★有帮助, 什么啊 2012-05-24 20:32:33
爱与雨下: 金币-1 2012-05-24 21:39:29
爱与雨下: 翻译EPI-1 2012-05-24 21:39:36
我们已经开发出正常Rh(Ⅲ)催化氧化异喹啉的合成使用瞬态邻ç5员rhodacycle的访问 -  H / N -  H活化。
我们发现,杂环以及允许访问一些独特的分子脚手架反应的耐受性。此外,不对称炔容忍高收益和高选择性与高功能组宽容。反应机制,探索发现,C  -  H激活是营业额的限制步骤。一系列的竞争实验揭示光在这个机甲机制,炔插入在很大程度上受空间位阻的因素和炔协调的,在产品的选择性起着核心作用。
2楼2012-05-20 14:13:45
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