The stereocontrolled total synthesis of spirastrellolide A methyl ester. Fragment coupling studies and completion of the synthesis
作者:Ian Paterson、Edward A. Anderson、Stephen M. Dalby、Jong Ho Lim、Philip Maltas
DOI:10.1039/c2ob25101a
日期:——
Attachment of the remainder of the side chain proved challenging, potentially due to steric hindrance by this macrocycle; an olefin cross-metathesis to install an electrophilic allylic carbonate and subsequent π-allyl Stille coupling with a C43–C47 stannane achieved this goal. Global deprotection completed the first total synthesis of (+)-spirastrellolide A methyl ester which, following detailed NMR correlation
A Second-Generation Total Synthesis of Spirastrellolide A Methyl Ester
作者:Ian Paterson、Philip Maltas、Stephen M. Dalby、Jong Ho Lim、Edward A. Anderson
DOI:10.1002/anie.201108594
日期:2012.3.12
Marine macrolides: An improved second‐generation totalsynthesis of the anticancer macrolide spirastrellolide A methylester has been achieved. The synthesis features a uniformly high level of stereocontrol combined with more expedient fragment assembly, and demonstrates a critical dependence of the crucial macrolactonization step on the substitution pattern of the C22–C24 linker region.
The stereocontrolled total synthesis of spirastrellolide A methyl ester. Expedient construction of the key fragments
作者:Ian Paterson、Edward A. Anderson、Stephen M. Dalby、Jong Ho Lim、Philip Maltas、Olivier Loiseleur、Julien Genovino、Christian Moessner
DOI:10.1039/c2ob25100k
日期:——
architecture, spirastrellolides represent attractive and challenging synthetic targets. A modular strategy for the synthesis of spirastrellolide A methylester, 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