174737-38-3Relevant academic research and scientific papers
Tandem IBX-Promoted Primary Alcohol Oxidation/Opening of Intermediate β,γ-Diolcarbonate Aldehydes to (E)-γ-Hydroxy-α,β-enals
Kumari, Anupama,Gholap, Sachin P.,Fernandes, Rodney A.
, p. 2278 - 2290 (2019/06/17)
A tandem IBX-promoted oxidation of primary alcohol to aldehyde and opening of intermediate β,γ-diolcarbonate aldehyde to (E)-γ-hydroxy-α,β-enal has been developed. Remarkably, the carbonate opening delivered exclusively (E)-olefin and no over-oxidation of γ-hydroxy was observed. The method developed has been extended to complete the stereoselective total synthesis of both (S)- and (R)-coriolides and d-xylo- and d-arabino-C-20 guggultetrols.
The stereocontrolled total synthesis of spirastrellolide A methyl ester. Expedient construction of the key fragments
Paterson, Ian,Anderson, Edward A.,Dalby, Stephen M.,Lim, Jong Ho,Maltas, Philip,Loiseleur, Olivier,Genovino, Julien,Moessner, Christian
supporting information; experimental part, p. 5861 - 5872 (2012/08/28)
Due to a combination of their promising anticancer properties, limited supply from the marine sponge source and their unprecedented molecular architecture, spirastrellolides represent attractive and challenging synthetic targets. A modular strategy for the synthesis of spirastrellolide A methyl ester, which allowed for the initial stereochemical uncertainties in the assigned structure was adopted, based on the envisaged sequential coupling of a series of suitably functionalised fragments; in this first paper, full details of the synthesis of these fragments are described. The pivotal C26-C40 DEF bis-spiroacetal was assembled by a double Sharpless asymmetric dihydroxylation/acetalisation cascade process on a linear diene intermediate, configuring the C31 and C35 acetal centres under suitably mild acidic conditions. A C1-C16 alkyne fragment was constructed by application of an oxy-Michael reaction to introduce the A-ring tetrahydropyran, a Sakurai allylation to install the C9 hydroxyl, and a 1,4-syn boron aldol/directed reduction sequence to establish the C11 and C13 stereocentres. Two different coupling strategies were investigated to elaborate the C26-C40 DEF fragment, involving either a C17-C25 sulfone or a C17-C24 vinyl iodide, each of which was prepared using an Evans glycolate aldol reaction. The remaining C43-C47 vinyl stannane fragment required for introduction of the unsaturated side chain was prepared from (R)-malic acid.
Synthesis of the DEF-bis-spiroacetal of spirastrellolide a exploiting a double asymmetric dihydroxylation/spiroacetalisation strategy
Paterson, Ian,Anderson, Edward A.,Dalby, Stephen M.,Lim, Jong Ho,Maltas, Philip,Moessner, Christian
, p. 4186 - 4188 (2007/10/03)
An efficient synthesis of the C26-C40 tricyclic [5,6,6]-bis-spiroacetal segment of the marine macrolide spirastrellolide A has been developed, exploiting a novel double Sharpless asymmetric dihydroxylation/spiroacetalisation sequence. The Royal Society of Chemistry 2006.
