摘要:
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.