![Stereoselective Construction of Seven-Membered Rings with an All-Carbon Quaternary Center by Direct Tiffeneau-Demjanov-type Ring Expansion Stereoselective Construction of Seven-Membered Rings with an All-Carbon Quaternary Center by Direct Tiffeneau-Demjanov-type Ring Expansion](https://www.organic-chemistry.org/abstracts/lit2/538m.gif)
Stereoselective Construction of Seven-Membered Rings with an All-Carbon Quaternary Center by Direct Tiffeneau-Demjanov-type Ring Expansion
![Illustration of benzene rings having each carbon position list in Table... | Download Scientific Diagram Illustration of benzene rings having each carbon position list in Table... | Download Scientific Diagram](https://www.researchgate.net/publication/296626983/figure/fig17/AS:962444096708614@1606475962261/Illustration-of-benzene-rings-having-each-carbon-position-list-in-Table-1-a-1-2-3-b.gif)
Illustration of benzene rings having each carbon position list in Table... | Download Scientific Diagram
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![organic chemistry - Carbocation rearrangement with expansion of five-membered ring? - Chemistry Stack Exchange organic chemistry - Carbocation rearrangement with expansion of five-membered ring? - Chemistry Stack Exchange](https://i.stack.imgur.com/7Frey.jpg)
organic chemistry - Carbocation rearrangement with expansion of five-membered ring? - Chemistry Stack Exchange
![What is the product of the following reaction? Ring with 5 Carbon and 1 oxygen in the ring with a oxygen double bond C-C-O-C-C-C=O + 2CH3MgBR-----> 1. Diethyl Ether 2. H30+ 3. What is the product of the following reaction? Ring with 5 Carbon and 1 oxygen in the ring with a oxygen double bond C-C-O-C-C-C=O + 2CH3MgBR-----> 1. Diethyl Ether 2. H30+ 3.](https://homework.study.com/cimages/multimages/16/troopmessenger_16557130965314738677060306523680.png)
What is the product of the following reaction? Ring with 5 Carbon and 1 oxygen in the ring with a oxygen double bond C-C-O-C-C-C=O + 2CH3MgBR-----> 1. Diethyl Ether 2. H30+ 3.
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![How can this 5 carbon ring become a 6 carbon ring? I don't understand how/why the carbon enters the ring. : r/chemhelp How can this 5 carbon ring become a 6 carbon ring? I don't understand how/why the carbon enters the ring. : r/chemhelp](https://i.redd.it/6kp84h2ebtw61.jpg)