Enantioselective Total Synthesis of the Antifungal Natural Products Chlorotetaine, Bacilysin, and Anticapsin and of Related Compounds: Revision of the Relative Configuration
摘要:
Enantioselective and diastereoselective syntheses of the title antifungal natural products and some of their diastereoisomers are described. Key steps include the diastereoselective 1,6-addition of bislactim ether 14 and a stereoselective, deprotonation of ketone 17 using lithium (S,S)-bis(1-phenylethyl)amide as a chiral base. All natural products possess the (S)-configuration at C-1 of the substituted cyclohex(en)yl residues of the C-terminal amino acids, which contradicts the assignments in the literature. At physiological pH most of the dipeptides are instable and react by an intramolecular 1,4-addition with the formation of 6-oxoperhydroindoles.
[EN] PEGYLATED CARFILZOMIB COMPOUNDS<br/>[FR] COMPOSÉS DE CARFILZOMIB PÉGYLÉS
申请人:AMGEN INC
公开号:WO2017205392A1
公开(公告)日:2017-11-30
The present invention provides polymeric pegylated carfilzomib compounds, and pharmaceutically acceptable salts thereof, of Formula I wherein R1, R2, linker, PEG, n and o are as defined herein. The invention also provides methods of making and using these compounds to treat cancer, and particularly to treat hematological malignancies including multiple myeloma.
Straightforward Synthesis of Nonconjugated Cyclohex-3-enone and Conjugated 4-Methylenecyclohex-2-enone Derivatives
作者:Gerhard Hilt、Julian Kuttner、Svenja Warratz
DOI:10.1055/s-0031-1289752
日期:2012.5
The synthesis of nonconjugated cyclohex-3-enones via the regiodivergent cobalt-catalysed Diels-Alder reactions of 2-(trimethylsilyloxy)buta-1,3-diene with alkynes and hydrolysis of the dihydroaromatic intermediates is described. The application of bidentate phosphine ligands versus pyridine-imine ligands led to the regioselective formation of one out of the two possible regioisomeric products when
An Improved Synthesis of 4-Methylene-2-cyclohexen-1-one
作者:Michael E. Jung、Heather L. Rayle
DOI:10.1080/00397919408013819
日期:1994.1
An improved synthesis of 4-methylene-2-cyclohexen-1-one (1) is described, which involves four steps from commercially available starting materials and proceeds in 65-75% overall yield.