[2n2π + 2n2π] Cycloadditions: an alternative to forbidden [4π + 4π] processes. The case of nitrone dimerization
نویسندگان
چکیده
منابع مشابه
[2n2π + 2n2π] cycloadditions: an alternative to forbidden [4π + 4π] processes. The case of nitrone dimerization.
A theoretical study based on (U)M06-2X/cc-pVTZ calculations has been used to investigate the [3 + 3] thermal dimerization of nitrones to 1,4,2,5-dioxadiazinanes in both the gas phase and in dichloromethane solution. Calculations suggest that dimerization of nitrones takes place through a concerted mechanism involving a formal disallowed [4π + 4π] cycloaddition with a free energy barrier of 30.8...
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15 صفحه اولDouble-tandem [4π+2π]·[2π+2π]·[4π+2π]·[2π+2π] synthetic sequence with photoprotolytic oxametathesis and photoepoxidation in the chromone series.
Chromones are introduced into a double-tandem [4(π)+2(π)]·[2(π)+2(π)]·[4(π)+2(π)]·[2(π)+2(π)] synthetic sequence, culminating in photoprotolytic oxametathesis, which leads to an expeditious growth of molecular complexity over a few experimentally simple steps. The overall reaction can potentially be utilized in diversity-oriented synthesis, as it allows for three or more diversity inputs furnis...
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ژورنال
عنوان ژورنال: Org. Biomol. Chem.
سال: 2014
ISSN: 1477-0520,1477-0539
DOI: 10.1039/c3ob42014k