Application of a Stereoselective Rhodium(II)-Catalyzed Oxonium Ylide Formation–[2,3]-Sigmatropic Rearrangement of an α-Diazo-β-keto Ester to the Synthesis of 2-epi-Cinatrin C1 Dimethyl Ester
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چکیده
منابع مشابه
Intramolecular reactions of metal carbenoids with allylic ethers: is a free ylide involved in every case?
Rhodium-, copper- and iridium-catalyzed reactions of the (13)C-labelled diazo carbonyl substrates 18* and 19* were performed. Results obtained from copper- and iridium-catalyzed reactions of the (13)C-labelled α-diazo β-keto ester 19* indicate that either or both of these reactions do not proceed via a free oxonium ylide but instead follow a competing non-ylide route that delivers apparent [2,3...
متن کاملRearrangement of β,γ-Unsaturated Esters with Thallium Trinitrate: Synthesis of Indans Bearing a β-Keto Ester Moiety
The indan skeleton is present in a variety of molecules with important biological activity, including the wellknown Indinavir and Aricept. Our research group has investigated approaches to obtain indans from 1,2dihydronaphthalenes, using a thallium(III)-promoted ring contraction reaction. During these studies, we found that a side chain at the double bond has a strong influence in the reaction ...
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رابطه ی میانِ هنر و شرایطِ اجتماعیِ زایش آن همواره در طولِ تاریخ دغدغه ی ذهنی و دل مشغولیِ اساسیِ منتقدان و نیز هنرمندان بوده است. از آنجا که هنر در قفس آهنیِ زندگیِ اجتماعی محبوس است، گسترش وابستگیِ آن با نهاد ها و اصولِ اجتماعی پیرامون، صرفِ نظر از هم سو بودن و یا غیرِ هم سو بودنِ آن نهاد ها، امری اجتناب ناپذیر به نظر می رسد. با این وجود پدیدار گشتنِ چنین مباحثِ حائز اهمییتی در میان منتقدین، با ظهورِ مکتب ما...
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chapter i provides an overview of structural linguistics and touches upon the saussurean dichotomies with the final goal of exploring their relevance to the stylistic studies of literature. to provide evidence for the singificance of the study, chapter ii deals with the controversial issue of linguistics and literature, and presents opposing views which, at the same time, have been central to t...
15 صفحه اولHighly stereoselective [2,3]-sigmatropic rearrangement of sulfur ylide generated through Cu(I) carbene and sulfides.
A highly stereoselective [2,3]-sigmatropic rearrangement of sulfur ylide generated through Cu(I) carbene and allyl and propargyl sulfides by a double asymmetric induction approach that combines a chiral camphor sultam auxiliary and Cu(I) catalyst with chiral or achiral diimine ligands has been developed.
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ژورنال
عنوان ژورنال: Synlett
سال: 2012
ISSN: 0936-5214,1437-2096
DOI: 10.1055/s-0032-1317694