Total Synthesis of (+)-Mycotrienol and (+)-Mycotrienin I
作者:James S. Panek、Craig E. Masse
DOI:10.1021/jo971793j
日期:1997.11.1
Total Synthesis of (+)-Mycotrienol and (+)-Mycotrienin I: Application of Asymmetric Crotylsilane Bond Constructions
作者:Craig E. Masse、Michael Yang、Jason Solomon、James S. Panek
DOI:10.1021/ja9743194
日期:1998.5.1
synthesis. All fourstereogeniccenters were introduced using chiral allylsilane bond construction methodology. In the synthesis of subunit 3b, the C12 and C13 stereocenters were installed using an asymmetric crotylsilylation reaction to α-keto dibenzyl acetal 5. The C11 stereocenter was subsequently installed via a chelate-controlled addition of allyltrimethylsilane to establish the anti-1,3-diol system
features of the synthesis are the formation of the Z-configured trisubstituted double bond by a one-pot esterification of allyl(diisopropoxy)borane and ring-closing metathesis, formation of the β-keto ester via ethyldiazoacetate addition to an aldehyde, and use of the Duthaler-Hafner acetate aldol reaction for the introduction of the stereocenter at C3. The practicality of this synthesis is demonstrated