289666-94-0Relevant articles and documents
Convergent total synthesis of (+)-mycalamide A
Kagawa, Natsuko,Ihara, Masataka,Toyota, Masahiro
, p. 6796 - 6805 (2007/10/03)
The details of a convergent total synthesis of (+)-mycalamide A are descri7bed. Yb(OTf)3-TMSCl-catalyzed cross-aldol reaction conditions are used to synthesize the right segment of mycalamide A. In this reaction, an acid-sensitive aldehyde reacts with methyl trimethylsilyl dimethylketene acetal without epimerization to provide the desired aldol adduct. Additionally, a tetrahydropyran ring, which is the left segment of mycalamide A, is prepared using a novel one-pot δ-lactone formation methodology. Both segments are constructed from a common starting material, D-mannitol. These segments are then coupled in the presence of BuLi, and the functional groups are transformed to complete the synthesis of (+)-mycalamide A.
A stereoselective synthesis of the C-10 to C-18 (right-half) fragment of mycalamides employing lewis acid promoted intermolecular aldol reaction.
Toyota,Hirota,Hirano,Ihara
, p. 2031 - 2034 (2007/10/03)
[reaction: see text] Beginning with D-mannitol, a stereoselective synthesis of the right-half segment of the mycalamides has been accomplished by employing Lewis acid catalyzed intermolecular aldol reaction and oxypalladation as the key steps.