Concise Enantioselective Total Synthesis of Neopeltolide Macrolactone Highlighted by Ether Transfer
作者:Rendy Kartika、Thomas R. Gruffi、Richard E. Taylor
DOI:10.1021/ol802254z
日期:2008.11.6
A concise totalsynthesis of neopeltolide macrolactone has been accomplished in 14 steps in the longest linear sequence, 15 steps overall from commercially available materials. The present synthesis was highlighted by successful exploitation of ether transfer methodology and a radical cyclization reaction to directly establish the requisite stereochemistry of the tetrahydropyran core.
Gonzalez, Ana Z.; Roman, Jose G.; Alicea, Eyleen, Journal of the American Chemical Society, 2009, vol. 131, p. 1269 - 1273
作者:Gonzalez, Ana Z.、Roman, Jose G.、Alicea, Eyleen、Canales, Eda、Soderquist, John A.
DOI:——
日期:——
Asymmetric γ-Methoxyallylation with the Robust 10-TMS-9-Borabicyclo[3.3.2]decanes
作者:Lorell Muñoz-Hernández、John A. Soderquist
DOI:10.1021/ol900865y
日期:2009.6.18
The asymmetric gamma-methoxyallylboration of aldehydes with the configurationally very stable 1 gives nonracemic threo-beta-methoxyhomoallylic alcohols 7 (65-93%) with excellent selectivity (96-99% de, 98-99% ee). The corresponding homoallylic amines 10 are obtained from N-H aldimines with similar efficiency (72-96%) and with excellent diastereoselectivity (98% de) but with lower enantioselectivity (56-86% ee). These new reagents provide ready access to a Taxol side chain derivative.