642
3
Chemical Glycosylation Reactions
⊡ Scheme 72
Retrosynthesis of Agelagalastatin 440
⊡ Scheme 73
Transformation of CB glycoside 441 into glycosyl fluoride 448 and final coupling of Agelagalastatin
> Scheme 71. All glycosyl couplings were based on the “latent-active” methodology, and all
were stereoselective. A slightly modified synthesis of 439 has been reported including one CB
mediated coupling [216].
3
Chemical Glycosylation Reactions
⊡ Scheme 72
Retrosynthesis of Agelagalastatin 440
⊡ Scheme 73
Transformation of CB glycoside 441 into glycosyl fluoride 448 and final coupling of Agelagalastatin
> Scheme 71. All glycosyl couplings were based on the “latent-active” methodology, and all
were stereoselective. A slightly modified synthesis of 439 has been reported including one CB
mediated coupling [216].