Browse
Submit Data
Databases
API
Help

Dataset Information

30 Views

0 Connections

0 Citations

0 Reanalyses

0 Downloads

Omics score: 0

Total synthesis of (-)-aplaminal.

ABSTRACT: The total synthesis and assignment of absolute configuration of (-)-aplaminal ( 1), a cytotoxic metabolite from a sea hare possessing a triazobicyclo[3.2.1]octane skeleton, has been achieved. The synthesis entailed condensation of a monoprotected diamine ( 3) with dimethyl 2-oxomalonate ( 4) to generate the imidazolidine core ( 2). Introduction of the third nitrogen via Mitsunobu activation and azide displacement, followed by reduction and lactam formation (AlMe 3), furnished (-)-aplaminal ( 1). Overall, the synthesis entailed 9 steps and proceeded in 19% overall yield.

SUBMITTER: Smith AB

PROVIDER: S-EPMC2775134 | biostudies-literature | 2008 Oct

REPOSITORIES: biostudies-literature

ACCESS DATA

Json Xml

Publications

Total synthesis of (-)-aplaminal.

Smith Amos B AB Liu Zhuqing Z

Organic letters 20080828 19

The total synthesis and assignment of absolute configuration of (-)-aplaminal ( 1), a cytotoxic metabolite from a sea hare possessing a triazobicyclo[3.2.1]octane skeleton, has been achieved. The synthesis entailed condensation of a monoprotected diamine ( 3) with dimethyl 2-oxomalonate ( 4) to generate the imidazolidine core ( 2). Introduction of the third nitrogen via Mitsunobu activation and azide displacement, followed by reduction and lactam formation (AlMe 3), furnished (-)-aplaminal ( 1). ...[more]

PMID: 18754624

Similar Datasets

Total synthesis of (+)-dactylolide.

Project description:[reaction: see text] The development of an approach leading to the total synthesis of dactylolide is described. The key features of this route include a catalytic asymmetric allylation, a diastereoselective pyran annulation, and a Horner-Wadsworth-Emmons macrocyclization.

| S-EPMC1480405 | biostudies-literature

Total synthesis of (-)-mucocin.

Project description:[reaction: see text] An enantioselective total synthesis of (-)-mucocin has been completed. A combination of asymmetric glycolate aldol additions and ring closing metathesis reactions were exploited to construct the C18-C34 and C7-C17 fragments. A selective cross-metathesis reaction was employed as the key step to couple two complex fragments.

| S-EPMC2546581 | biostudies-literature

Total synthesis of brevisamide.

Project description:The second total synthesis of Brevisamide, a marine cyclic ether alkaloid from Karenia brevis, is reported. This streamlined synthesis proceeds in 21 steps, 14 steps longest linear sequence, in 5.2% overall yield and features a key SmI(2) reductive cyclization step to access the tetrasubstituted pyran core.

| S-EPMC2838230 | biostudies-literature

Total synthesis of brevenal.

Project description:This Article describes the total synthesis of the marine ladder toxin brevenal utilizing a convergent synthetic strategy. Critical to the success of this work was the use of olefinic-ester cyclization reactions and the utilization of glycal epoxides as precursors to C-C and C-H bonds.

| S-EPMC5484051 | biostudies-literature

Total synthesis of (±)-isophellibiline.

Project description:The total synthesis of (±)-isophellibiline is described. This represents the first synthesis of a member of the nonaromatic homoerythrinan family of alkaloids. The tetracyclic ring system of the natural product was quickly assembled by a strategy that features a retrocycloaddition/cycloaddition reaction of an amidodioxin, an intramolecular Heck reaction and a 6?-electrocyclic ring closure of a dienoic acid.

| S-EPMC3269829 | biostudies-literature

Total synthesis of atropurpuran.

Project description:Due to their architectural intricacy and biological significance, the synthesis of polycyclic diterpenes and their biogenetically related alkaloids have been the subject of considerable interest over the last few decades, with progress including the impressive synthesis of several elusive targets. Despite tremendous efforts, conquering the unique structural types of this large natural product family remains a long-term challenge. The arcutane diterpenes and related alkaloids, bearing a congested tetracyclo[5.3.3.0(4,9).0(4,12)]tridecane unit, are included in these unsolved enigmas. Here we report a concise approach to the construction of the core structure of these molecules and the first total synthesis of (±)-atropurpuran. Pivotal features of the synthesis include an oxidative dearomatization/intramolecular Diels-Alder cycloaddition cascade, sequential aldol and ketyl-olefin cyclizations to assemble the highly caged framework, and a chemoselective and stereoselective reduction to install the requisite allylic hydroxyl group in the target molecule.

| S-EPMC4941107 | biostudies-literature

Total synthesis of teixobactin.

Project description:To cope with the global bacterial multidrug resistance, scientific communities have devoted significant efforts to develop novel antibiotics, particularly those with new modes of actions. Teixobactin, recently isolated from uncultured bacteria, is considered as a promising first-in-class drug candidate for clinical development. Herein, we report its total synthesis by a highly convergent Ser ligation approach and this strategy allows us to prepare several analogues of the natural product.

| S-EPMC4976201 | biostudies-literature

Total synthesis of clostrubin.

Project description:Clostrubin is a potent antibiotic against methicillin- and vancomycin-resistant bacteria that was isolated from a strictly anaerobic bacterium Clostridium beijerinckii in 2014. This polyphenol possesses a fully substituted arene moiety on its pentacyclic scaffold, which poses a considerable challenge for chemical synthesis. Here we report the first total synthesis of clostrubin in nine steps (the longest linear sequence). A desymmetrization strategy is exploited based on the inherent structural feature of the natural product. Barton-Kellogg olefination forges the two segments together to form a tetrasubstituted alkene. A photo-induced 6? electrocyclization followed by spontaneous aromatization constructs the hexasubstituted B ring at a late stage. In total, 200?mg of clostrubin are delivered through this approach.

| S-EPMC4382683 | biostudies-literature

Total synthesis of jiadifenolide.

Project description:As a potent neurotrophic agent, the sesquiterpenoid jiadifenolide represents a valuable small-molecule lead for the potential therapeutic treatment of neurodegenerative diseases. A stereocontrolled total synthesis of this densely functionalized natural product is reported, central to which is an adventurous samarium-mediated cyclization reaction to establish the tricyclic core and the adjacent C5 and C6 quaternary stereocenters.

| S-EPMC4320761 | biostudies-literature

Total synthesis of remdesivir.

Project description:Remdesivir, the first drug approved by the FDA to treat COVID-19, is in high demand for patients infected with the SARS-CoV-2 virus. Herein, we report a facile approach minimizing the protecting group manipulations to afford remdesivir in good overall yield.

| S-EPMC8656175 | biostudies-literature

OmicsDI is part of the ELIXIR infrastructure

OmicsDI is an Elixir interoperability service. Learn more ›

Tweets

OmicsDI Databases

PRIDE
PeptideAtlas
MassIVE
JPOST Repository
Physiome Model Repository

EGA
EVA
ENA
LINCS
PAXDB
Cell Collective

MetaboLights
Metabolomics Workbench
MetabolomeExpress
GNPS
BioModels
FAIRDOMHub

ArrayExpress
dbGaP
ExpressionAtlas
GEO
NODE

Information

Databases
Help
API
Contact us
Code on GitHub
Terms of use
Submit Data