Highly Regioselective 3-Hydroxyalkylations of Boron 4-Methoxy-2-furanolates: A New Entry to 5-Unsubstituted and 5-Monosubstituted 3-Acyl-4-O-Methyl Tetronates
作者:Franz F. Paintner、Lars Allmendinger、Gerd Bauschke
DOI:10.1055/s-2001-18071
日期:——
Boron 4-methoxy-2-furanolates generated in situ from 5-unsubstituted and 5-monosubstituted 4-O-methyl tetronates undergo highly regioselective 3-hydroxyalkylations with aldehydes to give 5-unsubstituted and 5-monosubstituted 3-acyl-4-O-methyl tetronates, respectively, in good overall yields after oxidation of the intermediate alcohols with 2-iodoxybenzoic acid.
The total synthesis of agglomerin A and (±)-carolinic acid. A general method for the preparation of 3-acyl tetronic acids via direct acylation of O-methyl 3-stannyl tetronates
作者:Steven V. Ley、Mark L. Trudell、David J. Wadsworth
DOI:10.1016/s0040-4020(01)91021-x
日期:1991.9
O-methyl-3-acyl tetronates were prepared in good yield from the corresponding acid chlorides via a palladium catalyzed acylation of O-methyl 3-(tri-n-butylstannyl) tetronates 5. This new synthetic method was then exploited for the total synthesis of the novel antibiotic agglomerin A 3a, as well as the fungal metabolite (±) carolinic acid 15.
Preparation of O-methyl 3-acyl tetronic acids by the direct acylation of stannyl tetronates
作者:Steven V. Ley、David J. Wadsworth
DOI:10.1016/s0040-4039(00)95301-2
日期:1989.1
LEY, STEVEN V.;WADSWORTH, DAVID J., TETRAHEDRON LETT., 30,(1989) N, C. 1001-1004
作者:LEY, STEVEN V.、WADSWORTH, DAVID J.
DOI:——
日期:——
A General Method for the Highly Regioselective Introduction of Substituents into the 3-Position of 5-Unsubstituted 4-<i>O</i>-Alkyl Tetronates
作者:Franz F. Paintner、Lars Allmendinger、Gerd Bauschke
DOI:10.1055/s-2005-918915
日期:——
A new, general method for the highly regioselective introduction of substituents into the 3-position of 5-unsubstituted 4-O-alkyl tetronates has been developed. 3-Lithiated 4-alkoxy-2-triisopropylsilyloxyfurans generated from the corresponding 3-iodo-precursors via halogen-metal exchange serve as key intermediates.