General, Highly Selective Synthesis of 1,3‐ and 1,4‐Difunctionalized Building Blocks by Regiodivergent Epoxide Opening
作者:Nico Funken、Felix Mühlhaus、Andreas Gansäuer
DOI:10.1002/anie.201606064
日期:2016.9.19
regiodivergent epoxide opening (REO) featuring a catalyst‐controlled synthesis of enantiomerically and diastereomerically highly enriched or pure syn‐ and anti‐ 1,3‐ and 1,4‐difunctionalized buildingblocksfrom a common epoxide precursor. The REO is attractive for natural product synthesis and as a branching reaction for diversity‐oriented synthesis with epoxides.
Stereoselective synthesis of 10,11-dihydro-leukotriene B4 and related metabolites
作者:Yuichi Kobayashi、Yuji Nakayama、G. Biju Kumar
DOI:10.1016/s0040-4039(98)01346-x
日期:1998.8
Nickel-catalyzed coupling reaction of cis bromide 6 and the berates 5a and 5b, prepared from the boronate esters 4a and 4b, proceeded stereospecifically to furnish 7a and 7b, which upon treatment with Bu4NF in THF afforded 10,11-dihydro-leukotriene B-4 (1) and the B-3 (2), respectively. In a similar way, EE ether 19 and rac-4a gave 20 and the subsequent functional group transformation afforded 10,11-dihydro-12-oxo-LTB4 (3). (C) 1998 Elsevier Science Ltd. All rights reserved.