Synthesis of (−)-Hygromycin A: Application of Mitsunobu Glycosylation and Tethered Aminohydroxylation
作者:Timothy J. Donohoe、Aida Flores、Carole J. R. Bataille、Fátima Churruca
DOI:10.1002/anie.200902840
日期:2009.8.17
Key points in the synthesis of (−)‐hygromycin A are the tetheredaminohydroxylation reaction used to prepare the aminocyclitol unit and the choice of a bulky protecting group on the sugar unit to facilitate selective Mitsunobuglycosylation and also bestow kinetic stability upon an otherwise vulnerable proton.
A C2-Symmetric Pool Based Synthesis of the Furanoside of Hygromycin A
作者:Tu-Hsin Yan、Hong-Jay Lo、Yuan-Kang Chang
DOI:10.3987/com-12-s(n)19
日期:——
The readily available and inexpensive D-tartaric acid serves as the chiral building block for synthesis of the furanoside of hygromycin A. Key to our successes in the asymmetric synthesis of the furanose segment was the melding of several key reactions, such as the successful application of the monosilylation of C-2-symmetric diol, diastereocontrolled di(2-propenyl)zinc addition to the aldehyde, and TMSCl-MeOH promoted desilylation, acetal-cleavage, and intramolecular esterification in one-step.