5910-88-3Relevant academic research and scientific papers
Stereoselective Synthesis of 2 Z,4 e -Configured Dienoates through Tethered Ring Closing Metathesis
Schmidt, Bernd,Aud?rsch, Stephan,Kunz, Oliver
supporting information, p. 4509 - 4518 (2016/12/16)
A two-step sequence leading from racemic allylic alcohols and vinylacetic acid to ethyl (2Z,4E)-dienoates is described. The sequence involves Steglich esterification of the reactants, followed by a one-pot ring closing metathesis-base induced elimination-
Total synthesis, assignment of the relative and absolute stereochemistry, and structural reassignment of phostriecin (aka Sultriecin).
Burke, Christopher P.,Haq, Nadia,Boger, Dale L.
supporting information; experimental part, p. 2157 - 2159 (2010/05/11)
A total synthesis of phostriecin (2), previously known as sultriecin (1), its structural reassignment as a phosphate versus sulfate monoester, and the assignment of its relative and absolute stereochemistry are disclosed herein. Key elements of the work, which provided first the originally assigned sulfate monoester 1 and then the reassigned and renamed phosphate monoester 2, relied on diagnostic (1)H NMR spectroscopic properties of the natural product for the assignment of relative and absolute stereochemistry as well as the subsequent structural reassignment, and a convergent asymmetric total synthesis to provide the unequivocal authentic materials. Key steps of the synthetic approach include a Brown allylation for diastereoselective introduction of the C9 stereochemistry, an asymmetric CBS reduction to establish the lactone C5-stereochemistry, diastereoselective oxidative ring expansion of an alpha-hydroxyfuran to access the pyran lactone precursor, and single-step installation of the sensitive Z,Z,E-triene unit through a chelation-controlled cuprate addition with installation of the C11 stereochemistry. The approach allows ready access to analogues that can now be used to probe important structural features required for protein phosphatase 2A inhibition, the mechanism of action defined herein.
Total synthesis and evaluation of phostriecin and key structural analogues
Burke, Christopher P.,Swingle, Mark R.,Honkanen, Richard E.,Boger, Dale L.
scheme or table, p. 7505 - 7513 (2011/02/23)
Full details of the total synthesis of phostriecin (2), the assignment of its relative and absolute stereochemistry, and the resultant structural reassignment of the natural product previously represented as sultriecin (1), a phosphate versus sulfate mono
The preparation and electrocyclic ring-opening of cyclobutenes: Stereocontrolled approaches to substituted conjugated dienes and trienes
Binns, Falmai,Hayes, Roy,Hodgetts, Kevin J.,Saengchantara, Suthiweth T.,Wallace, Timothy W.,Wallis, Christopher J.
, p. 3631 - 3658 (2007/10/03)
Thermal electrocyclic ring-opening of 4-alkyl-2-cyclobutene-1-carbaldehydes occurs at low temperature to give (2Z,4E)-alkadienals exclusively, and the process is exploited in transforming cis-3-cyclobutene-1,2-dimethanol 1 into a variety of naturally occurring 1,3,5-alkatrienes and 2,4-decadienoates. Desymmetrisation of 1 with Pseudomonas fluorescens lipase gives access to both enantiomers of 3-oxabicyclo[3.2.0]hept-6-en-2-one 4, for use in stereocontrolled routes to 6-oxygenated (2Z,4E)-alkadienals.
Reduction of 1,1-difluoro-1-alken-3-ols with lithium tetrahydroaluminate. Application to the synthesis of 1,1-difluoro-2-alkenes and 2-alkenals
Telliera, Frederique,Sauvetre, Raymond
, p. 181 - 185 (2007/10/03)
The reduction of 1,1-difluoro-1-alken-3-ols with lithium tetrahydroaluminate is described. The 1-fluoro-1-alken-3-ols obtained can be transformed to enals or difluoromethylated allylic derivatives.
Use of cis-3-cyclobutene-1,2-dimethanol in stereoselective routes to some naturally occurring conjugated dienes and trienes
Hodgetts, Kevin J.,Saengchantara, Suthiweth T.,Wallis, Christopher J.,Wallace, Timothy W.
, p. 6321 - 6324 (2007/10/02)
Thermal electronic ring-opening of 4-alkyl-2-cyclobutene-1-carbaldehydes occurs at low temperature to give (2Z,4E)-alka-2,4-dienals exclusively, and this process is exploited en route to various isomeric naturally occurring 1,3,5-alkatrienes and 2,4-decadienoates from a single precursor, cis-3-cyclobutene-1,2-dimethanol 4.
Stereospecific Synthesis of Dienes and Trienes from Pyrylium Perchlorate: a Convergent Approach to Leukotrienes
Furber, Mark,Taylor, Richard J. K.
, p. 782 - 783 (2007/10/02)
A range of conjugated dienes and trienes have been prepared in a stereospecific manner by the treatment of pyrylium perchlorate with organolithium reagents; model studies have been carried out which demonstrate the suitability of this methodology for the
