106231-29-2Relevant articles and documents
Exploring biosynthetic relationships among furanocembranoids: Synthesis of (-)-bipinnatin J, (H-)-intricarene, (+)-rubifolide, and (+)-isoepilophodione B
Roethle, Paul A.,Hernandez, Paul T.,Trauner, Dirk
, p. 5901 - 5904 (2006)
(Diagram presented) The asymmetric total synthesis of (-)-bipinnatin J and its conversion into (+)-intricarene through a transannular 1,3-dipolar cycloaddition is described. In addition, the conversion of (-)-bipinnatin J into (+)-rubifolide and (+)-isoepilophodione B is reported. Biosynthetic relationships among furanocembranoids and the possible role of 1,3-dipolar cycloadditions in biosynthesis are discussed.
Total synthesis of coralloidolides A, B, C, and E
Kimbrough, Thomas J.,Roethle, Paul A.,Mayer, Peter,Trauner, Dirk
, p. 2619 - 2621 (2010)
"Chemical Equation Presented" Mapping the matrix: Several coralloidolides, members of a Mediterranean branch of the furanocembranoid family of diterpenes, have been synthesized. The total syntheses include biomimetic transformations that often occur with high chemoselectivity, thus obviating the need for protecting-group manipulations. The fascinating reactivity of 2,5-diene-1,4dione moieties was explored in detail.
Synthesis of exo enol ether-cyclic ketal isomers of substituted furanmethanol structures related to marine furanocembranoids
Li, Yi,Pattenden, Gerald,Rogers, Joseph
body text, p. 1280 - 1283 (2010/04/27)
Oxidations of the 2-alkenylfurans 8a and 8b, using peroxy reagents, lead to the dienedione 9 and the furan epoxide 10, respectively. Treatment of the epoxide 10 with p-TSA in MeOH produces the enol ether cyclic ketal 12, which is rapidly isomerised to the furanmethanol ether 15, isolated in 80% yield. By contrast, when the propanol-substituted furan epoxide 23 was kept in CDCl3 containing traces of HCl for 2 h, a 3:2 mixture of Z- and E-isomers of the enol ether spiro ketals 25a and 25b was produced in >92% yield; after 24 h this mixture of isomers underwent dehydration leading to the corresponding enol ether triene 26 (70%). When a solution of the dienedione 9 in H2O-THF containing p-TSA was stirred at 25 °C for 20 h, the tertiary alcohol 27 was produced which, after a further 20 h was converted into the furan vicinal diol 29. Likewise, when the 'cembranoid' dienedione 31 was treated with p-TSA-H2O, the hydroxymethyl-substituted furanobutenolide 33 was produced in 40% yield. It is probable that the enol ether cyclic hemiketals 28 and 32/34, which are related to 12 and 25, and also to the naturally occurring cembranoids 1 and 2 found in corals, are transient intermediates in the conversions leading to 29 and 33 from 9 and 31, respectively.