Synthesis of the 9,10-acetonide of 9-dihydro-FK-506
摘要:
The synthesis of the analog FKANAL (I) of the immunosuppressant FK-506 in Which the central features are the spiroenone system B which masks the alpha-allyl aldol portion of FK-506 and the spiroketal D which mimics the alpha-keto amide portion is described.
作者:Robert E. Ireland、James L. Gleason、Laura D. Gegnas、Thomas K. Highsmith
DOI:10.1021/jo951646q
日期:1996.1.1
A totalsynthesis of FK-506 (1) is presented. The synthesis features a highly convergent approach utilizing a block coupling strategy. Top and bottom half sections of the molecule are coupled by addition of a vinyl cuprate with a spiroenone. The alpha-allyl aldol functionality is revealed by a reductive opening of the spiroenone system. The labile alpha,beta-diketoamide hemiketal portion of the molecule