Studies toward the total synthesis of dihydrolycolucine. Preparation of AB and CEF ring fragments.
J Org Chem
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| Abstract | A strategy for the synthesis of the lycopodium alkaloid dihydrolycolucine (1) has been investigated. Synthetic routes were developed based on N-acylpyridinium salt chemistry to prepare target fragments 3 and 4 that could ultimately converge to the natural product. Key reactions include IMDA cycloadditions and retro-Mannich ring-openings to form both the AB and the EF ring fragments. The ring C precursor was prepared using pyridine substitution and directed lithiation chemistry. A Suzuki cross-coupling of rings C and EF led to the CEF ring fragment. Initial attempts at closure of the seven-membered D ring were unsuccessful. |
| Year of Publication | 2014
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| Journal | J Org Chem
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| Volume | 79
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| Issue | 12
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| Pages | 5740-5
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| Date Published | 2014 Jun 20
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| ISSN | 1520-6904
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| DOI | 10.1021/jo500878v
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| PubMed ID | 24841361
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| PubMed Central ID | PMC4066915
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| Grant list | R01 GM034442 / GM / NIGMS NIH HHS / United States
GM 34442 / GM / NIGMS NIH HHS / United States
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