An enantioselective formal synthesis of the proteasome inhibitor (+)-lactacystin
作者:Martin P. Green、Jeremy C. Prodger、Christopher J. Hayes
DOI:10.1016/s0040-4039(02)01459-4
日期:2002.9
An enantioselective formal synthesis of the proteasome inhibitor (+)-lactacystin has been achieved using an alkylidene carbene 1,5-CH insertion reaction as a key step. The key cyclisation precursor was synthesised in high diastereomeric excess using a combination of known procedures, with the two key asymmetric centres being introduced via a Sharpless asymmetric epoxidation reaction. KHMDS induced
The reported preparation of the p-ansa compound frangulanine, previously isolated from Rhamnus frangula L., also constitutes the first total synthesis of a fourteen-membered cyclopeptide alkaloid.
Enantioselective Total Syntheses of Omuralide, 7-<i>epi</i>-Omuralide, and (+)-Lactacystin
作者:Christopher J. Hayes、Alexandra E. Sherlock、Martin P. Green、Claire Wilson、Alexander J. Blake、Matthew D. Selby、Jeremy C. Prodger
DOI:10.1021/jo7027695
日期:2008.3.1
An alkylidene carbene 1,5-CH insertion has been used as a key step in an enantioselective total syntheses of omuralide, its C7-epimer, and (+)-lactacystin. An additional noteworthy feature of the synthesis is the use of a novel oxidative deprotection procedure, utilizing DMDO, for the conversion of a late-stage benzylidene acetal into a primary alcohol and a secondary benzoate ester.