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Interesting Organic Chemistry and Natural Products. | Just another Chemistry site

Interesting Organic Chemistry and Natural Products. Just another Chemistry site. Publication of the week, number 90, 14th August 2015. August 14, 2015. ASAP of the week. I see that the Baran group are synthesising simple molecules again. This week they reported their route to the potent anti-tumour compounds verruculogen and fumitremorgin A; two alkaloids with lots of rings and an endoperoxide in an eight membered ring. Not to mention a substituent at the 6 position of the indole ring. But they were able...

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Interesting Organic Chemistry and Natural Products. | Just another Chemistry site | quintus.mickel.ch Reviews

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Interesting Organic Chemistry and Natural Products. Just another Chemistry site. Publication of the week, number 90, 14th August 2015. August 14, 2015. ASAP of the week. I see that the Baran group are synthesising simple molecules again. This week they reported their route to the potent anti-tumour compounds verruculogen and fumitremorgin A; two alkaloids with lots of rings and an endoperoxide in an eight membered ring. Not to mention a substituent at the 6 position of the indole ring. But they were able...

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Interesting Organic Chemistry and Natural Products. | Just another Chemistry site | quintus.mickel.ch Reviews

https://quintus.mickel.ch

Interesting Organic Chemistry and Natural Products. Just another Chemistry site. Publication of the week, number 90, 14th August 2015. August 14, 2015. ASAP of the week. I see that the Baran group are synthesising simple molecules again. This week they reported their route to the potent anti-tumour compounds verruculogen and fumitremorgin A; two alkaloids with lots of rings and an endoperoxide in an eight membered ring. Not to mention a substituent at the 6 position of the indole ring. But they were able...

INTERNAL PAGES

quintus.mickel.ch

1

Synthetic methods | Interesting Organic Chemistry and Natural Products.

http://quintus.mickel.ch/category/synthetic-methods

Interesting Organic Chemistry and Natural Products. Just another Chemistry site. Category Archives: Synthetic methods. Publication of the week, number 109, 25th December 2015. December 25, 2015. ASAP of the week. Has attacked a synthetic and a biological problem in this week’s ASAP. He describes another scalable synthesis this time of antroquinonol a compound in phase II trials for various cancers. Six-step, enantioselective, scalable synthesis of antroquinono. And what is the rest of the material? The r...

2

iridium catalysts | Interesting Organic Chemistry and Natural Products.

http://quintus.mickel.ch/tag/iridium-catalysts

Interesting Organic Chemistry and Natural Products. Just another Chemistry site. Tag Archives: iridium catalysts. Publication of the week, number 90, 14th August 2015. August 14, 2015. ASAP of the week. So several challenges in making this molecule. Obviously substitution at the indole 6 position then the endoperoxide next to oxidisable double bonds, and, of course, the rest of the molecule. Tryptophan lends itself as an obvious starting material and indeed that’s where it began. But they were able to is...

3

Interesting Organic Chemistry and Natural Products. | Just another Chemistry site | Page 2

http://quintus.mickel.ch/page/2

Interesting Organic Chemistry and Natural Products. Just another Chemistry site. April 12, 2016. ASAP of the week. I suppose it had to be, the Chinese have isolated a compound they call dragonbloodin. It’s an amazingly simple compound:. I won’t go into the details, but it looks correct! So that bottle of red stuff in my lab did have something in it. So lets see a synthesis soon with an imaginative title. And congratulations to the isolation and identification team. 725 total views, 1 views today. N-Sulfa...

4

Natural Products | Interesting Organic Chemistry and Natural Products.

http://quintus.mickel.ch/category/natural-products

Interesting Organic Chemistry and Natural Products. Just another Chemistry site. Category Archives: Natural Products. April 12, 2016. ASAP of the week. I suppose it had to be, the Chinese have isolated a compound they call dragonbloodin. It’s an amazingly simple compound:. I won’t go into the details, but it looks correct! So that bottle of red stuff in my lab did have something in it. So lets see a synthesis soon with an imaginative title. And congratulations to the isolation and identification team.

5

C-H functionalisation | Interesting Organic Chemistry and Natural Products.

http://quintus.mickel.ch/category/c-h-functionalisation

Interesting Organic Chemistry and Natural Products. Just another Chemistry site. Category Archives: C-H functionalisation. Publication of the week, number 100, 23rd October 2015. October 23, 2015. ASAP of the week. I see the Baran group. Is still investigating the oxidation of complex natural products. In this week’s ASAP. They turn their attention to the steroid framework, examining oxidation at C-12. Fortunately help was at hand in the form of a paper by Schönecker. And reductants such as Zn, triethyls...

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modernsteroid.blogspot.com

modern steroid science: Glycosylation Reactions Involving a High Degree of Chemical Complexity: Nicolaou’s Total Synthesis of Shishijimicin A

http://modernsteroid.blogspot.com/2015/08/glycosylation-reactions-involving-high.html

Driven by the great medicinal potential of the steroidal sex hormones and anti-inflammatory agents, the period of the 1930s through the 1950s has been called the golden age of steroid chemistry. In recent years, steroid research has witnessed a renaissance, as a new generation of scientists has begun to recognize the pharmacologically privileged nature of the steroidal molecular framework. This blog highlights achievements pertaining to steroid technologies published from 2010 to the present. A number of...

modernsteroid.blogspot.com

modern steroid science: April 2015

http://modernsteroid.blogspot.com/2015_04_01_archive.html

Driven by the great medicinal potential of the steroidal sex hormones and anti-inflammatory agents, the period of the 1930s through the 1950s has been called the golden age of steroid chemistry. In recent years, steroid research has witnessed a renaissance, as a new generation of scientists has begun to recognize the pharmacologically privileged nature of the steroidal molecular framework. This blog highlights achievements pertaining to steroid technologies published from 2010 to the present. The authors...

heterocyclist.com

Just look at the structure of this alkaloid! | The Heterocyclist

https://heterocyclist.com/2013/01/28/just-look-at-the-structure-of-this-alkaloid

A blog about heterocyclic chemistry. January 28, 2013. Just look at the structure of this alkaloid! Sometimes you just have to step back and marvel at the structures that are found in nature. Check out zamamiphidin A, a new manzamine alkaloid isolated from an Okinawan sponge by J. Kobayashi and co-workers ( Organic Letters. Heptacyclic. Quaternary ammonium. Massively bridged. Well done, sponges! Laquo; Previous post. Next post ». 7 responses to “Just look at the structure of this alkaloid! I guess when y...

heterocyclist.com

Uncategorized | The Heterocyclist

https://heterocyclist.com/category/uncategorized

A blog about heterocyclic chemistry. RSS for this section. April 29, 2013. Pd(II)-Catalyzed Dehydrogenative Cyclizations of. Near-simultaneous reports of an interesting new pyrrole (and dihydropyrrole) synthesis have appeared recently from the labs of Frank Glorius (Westfälische Wilhelms-Universität Münster). And Naohiko Yoshikai (Nanyang Technologial University, Singapore). The scope of the reaction is decent, as indicated below. Failures include R. Or cyclopropyl and R. February 4, 2013. I keep it upda...

heterocyclist.com

Pd(II)-Catalyzed Dehydrogenative Cyclizations of N-Allylimines | The Heterocyclist

https://heterocyclist.com/2013/04/29/pdii-catalyzed-dehydrogenative-cyclizations-of-n-allylimines

A blog about heterocyclic chemistry. April 29, 2013. Pd(II)-Catalyzed Dehydrogenative Cyclizations of. Near-simultaneous reports of an interesting new pyrrole (and dihydropyrrole) synthesis have appeared recently from the labs of Frank Glorius (Westfälische Wilhelms-Universität Münster). And Naohiko Yoshikai (Nanyang Technologial University, Singapore). The scope of the reaction is decent, as indicated below. Failures include R. Or cyclopropyl and R. Cinnamyl imines were also unsuccessful. Notify me of n...

modernsteroid.blogspot.com

modern steroid science: June 2014

http://modernsteroid.blogspot.com/2014_06_01_archive.html

Driven by the great medicinal potential of the steroidal sex hormones and anti-inflammatory agents, the period of the 1930s through the 1950s has been called the golden age of steroid chemistry. In recent years, steroid research has witnessed a renaissance, as a new generation of scientists has begun to recognize the pharmacologically privileged nature of the steroidal molecular framework. This blog highlights achievements pertaining to steroid technologies published from 2010 to the present. Steroidal g...

heterocyclist.com

Name Reactions | The Heterocyclist

https://heterocyclist.com/category/name-reactions

A blog about heterocyclic chemistry. RSS for this section. August 6, 2015. Regioselective synthesis of 3- and 5-aminopyrazoles. Just a bit of sodium ethoxide does the trick …. Wouldn’t it be nice to be able to produce either the 3- or 5-aminopyrazole regioisomer in a selective fashion? From Boehringer Ingelheim is a most welcome arrival. Heating the nitrile 3. With the alkyl-substituted hydrazine 4. In ethanol produces the 5-aminopyrazole 7. Presumably through the adduct 5. Should be larger than k. Fandr...

heterocyclist.com

Oldies-But-Goodies | The Heterocyclist

https://heterocyclist.com/category/oldies-but-goodies

A blog about heterocyclic chemistry. RSS for this section. August 6, 2015. Regioselective synthesis of 3- and 5-aminopyrazoles. Just a bit of sodium ethoxide does the trick …. Wouldn’t it be nice to be able to produce either the 3- or 5-aminopyrazole regioisomer in a selective fashion? From Boehringer Ingelheim is a most welcome arrival. Heating the nitrile 3. With the alkyl-substituted hydrazine 4. In ethanol produces the 5-aminopyrazole 7. Presumably through the adduct 5. Should be larger than k. Fandr...

heterocyclist.com

The Heterocyclist | A blog about heterocyclic chemistry | Page 2

https://heterocyclist.com/page/2

A blog about heterocyclic chemistry. October 21, 2012. How did this slip by the referees? Azomethine imines are not azomethine ylides. A recent paper by Xingwei Li and co-workers in Angewandte Chemie International Edition has some nice chemistry in it, but take a look at the title, “ Rhodium(III)-catalyzed oxidative C-H functionalization of azomethine ylides. 8221; One might expect to see some azomethine ylides, right? No, they are azomethine imines:. Edit: Here’s another paper from the same lab. Species...

heterocyclist.com

Drugs | The Heterocyclist

https://heterocyclist.com/category/drugs

A blog about heterocyclic chemistry. RSS for this section. February 4, 2013. Short Course: “Heterocyclic Chemistry – A Drug-Oriented Approach”. Interested in having a short course on Heterocyclic Chemistry at your company? In late 2011, I put together a new two-day short course entitled Heterocyclic Chemistry – A Drug-Oriented Approach. To present at companies. In a nutshell, it’s an intensive, preparatively-oriented. I keep it updated with lots of current chemistry. January 7, 2013. Here’s a process tha...

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Interesting Organic Chemistry and Natural Products. | Just another Chemistry site

Interesting Organic Chemistry and Natural Products. Just another Chemistry site. Publication of the week, number 90, 14th August 2015. August 14, 2015. ASAP of the week. I see that the Baran group are synthesising simple molecules again. This week they reported their route to the potent anti-tumour compounds verruculogen and fumitremorgin A; two alkaloids with lots of rings and an endoperoxide in an eight membered ring. Not to mention a substituent at the 6 position of the indole ring. But they were able...

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