Facile and Efficient Total Synthesis of (+)-Preussin
摘要:
The enantioselective total synthesis of (+)-preussin, a potent antifungal agent, has been achieved, The key steps are a Pd(0)-catalyzed oxazoline forming reaction from L-phenylalanine, hydrogenolysis, and subsequent diastereoselective reductive cyclization of the intermediate aminoketone to pyrrolidine using Pearlman's catalyst.
Stereoselective synthesis of the antifungal antibiotic (+)-preussin
作者:G. Veeresa、Apurba Datta
DOI:10.1016/s0040-4020(98)00981-8
日期:1998.12
A concise total synthesis of enantiopure (+)-preussin (1) from L-phenylalanine (3) is described. The key steps involve i) syn-selective formation of the 1, 2-amino alcohol fragment2, via chelation controlled addition of allylmagnesium bromide toN-Boc-phenylalaninal, and ii) L-selectride® mediated stereoselective reduction of the ketone8 to the alcohol derivative9 with the required stereochemistry for
Sulfamidate-Based Stereoselective Total Synthesis of (+)-Preussin Using Gold(I)-Catalyzed Intramolecular Dehydrative Amination: Dead End and Detour
作者:Yunjeong Park、Jae-Sang Ryu
DOI:10.1021/acs.joc.3c00670
日期:2023.7.21
afford 3-hydroxypyrrolidine motif stereoselectively. The energy of the constrained bicyclic ring system is relieved by the subsequent ring-opening process, which leads to a stereoselective formation of the 3-hydroxypyrrolidine motif under mild reaction conditions. The success of this approach not only provides a new method for the total synthesis of enantiomerically pure (+)-preussin but also highlights
Practical Asymmetric Approach to Pyrrolidinones: Efficient Synthesis of (+)-Preussin and (−)-AHPPA
作者:Alice Kanazawa、Sandra Gillet、Philippe Delair、Andrew E. Greene
DOI:10.1021/jo9801162
日期:1998.7.1
A novel, dichloroketene-chiral enol ether cycloaddition-based synthesis of enantiopure (+)-preussin and (-)-AHPPA has been realized. The efficient, highly stereoselective approach, which involves a Beckmann ring expansion reaction to access the key pyrrolidinone, proceeds in ca. 16% overall yield for each of the compounds.