1996
DOI: 10.1016/0040-4039(96)01373-1
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Total synthesis of hemibrevetoxin B

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Cited by 64 publications
(30 citation statements)
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“…The third total synthesis of hemibrevetoxin (8) was reported in 1996 by the Nakata research group (Scheme 30). [64,86] Their strategy involved Sharpless asymmetric epoxidation to introduce chirality into their prochiral starting material geraniol (166!167), and two 6-exo epoxide openings (167!168 and 169!170) to forge the bicyclic sulfonate 171 as the substrate for the key double ring expansion that produced the bisoxepane 172 (CD ring system). From there on they utilized the directed 6-endo epoxide opening to forge ring B (173!174), and after formation of ring A the methyl acetal was allylated (175 + 176!177).…”
Section: Hemibrevetoxinmentioning
confidence: 99%
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“…The third total synthesis of hemibrevetoxin (8) was reported in 1996 by the Nakata research group (Scheme 30). [64,86] Their strategy involved Sharpless asymmetric epoxidation to introduce chirality into their prochiral starting material geraniol (166!167), and two 6-exo epoxide openings (167!168 and 169!170) to forge the bicyclic sulfonate 171 as the substrate for the key double ring expansion that produced the bisoxepane 172 (CD ring system). From there on they utilized the directed 6-endo epoxide opening to forge ring B (173!174), and after formation of ring A the methyl acetal was allylated (175 + 176!177).…”
Section: Hemibrevetoxinmentioning
confidence: 99%
“…Third total synthesis of hemibrevetoxin (8; Nakata and co-workers, 1996). [86] Marine Polyethers Angewandte Chemie the starting material. This was conveniently converted into ring A intermediate 179, from which the addition of the first oxiranyl anion 180 followed by cyclization proceeded smoothly to form ring B (181).…”
Section: Hemibrevetoxinmentioning
confidence: 99%
“…The endo-selective opening of alkenyl epoxides has become a standard tool for synthesis of tetrahydropyran rings that has been used by the groups of Nicolaou, Yamamoto, Nakata, Mori, and Sasaki in syntheses of hemibrevetoxin B [204][205][206][207], brevetoxin B [208][209][210], brevetoxin A [211], gambierol [212][213][214][215][216], and brevenal [135,136]. This method is generally not amenable to cascades of more than one epoxide.…”
Section: Applications Of Epoxide-opening Cascades In the Synthesis Ofmentioning
confidence: 99%
“…[88] Sie wendeten Clarks Variante der Synthese von Etherringen durch Methylenierung und Metathese an, um die Zwischenstufe 186 aus Moris Synthese (Schema 31) in racemischer Form zu erhalten. [87] Dazu bildeten sie durch eine Diels-Alder-Reaktion [91] nach Jacobsen zur enantiomerenreinen Zwischenstufe 199 aus der Synthese von Nakata et al [86] Somit war die formale asymmetrische Totalsynthese von Hemibrevetoxin (8) an diesem Punkt abgeschlossen. [96] Diese [98] und umfasste drei reduktive Cyclisierungen mit SmI 2 (255!256 und 257!…”
Section: Hemibrevetoxinunclassified