Jacobsen Protocols for Large-Scale Epoxidation of Cyclic Dienyl Sulfones: Application to the (+)-Pretazettine Core
作者:G. Reza Ebrahimian、Xavier Mollat du Jourdin、Philip L. Fuchs
DOI:10.1021/ol300996m
日期:2012.5.18
A Jacobsen epoxidation protocol using H2O2 as oxidant was designed for the large-scale preparation of various epoxy vinyl sulfones. A number of cocatalysts were screened, and pH control led to increased reaction rate, higher turnover number, and improved reliability.
设计了一种以H 2 O 2为氧化剂的Jacobsen环氧化方案,用于大规模制备各种环氧乙烯基砜。筛选了许多助催化剂,控制pH值可提高反应速率,提高周转次数并提高可靠性。
[EN] LARGE-SCALE DIASTEREOSELECTIVE SYNTHESES OF CYCLOHEPTADIENYLSULFONES AND STEREOTETRADS<br/>[FR] SYNTHESES DIASTEREOSELECTIVES A GRANDE ECHELLE DE CYCLOHEPTADIENYLSULFONES ET DE STEREOTETRADES
申请人:PURDUE RESEARCH FOUNDATION
公开号:WO2016057606A1
公开(公告)日:2016-04-14
The invention relates to processes for large-scale diastereoselective syntheses of cycloheptadienylsulfone and stereo tetrads, key intermediates for the preparation of Aplyronine A.
Citric acid mediated catalytic osmylation/oxidative cleavage of electron deficient olefins: a vinyl sulfone study
作者:Thomas P. Bobinski、Philip L. Fuchs
DOI:10.1016/j.tetlet.2015.05.044
日期:2015.7
The first broad catalytic dihydroxylation of enantiopure cyclic vinyl sulfones followed by oxidative cleavage of the resulting acyloin provides linear termini-differentiated polyketide fragments. This mild vinyl sulfone cleavage provides an effective alternative to the current ozonolysis protocol. (C) 2015 Elsevier Ltd. All rights reserved.
Synthesis of Enantiopure Termini-Differentiated Heptane Stereotriads.<sup>1</sup> Application to Side Chain-Functionalized Tetrahydrofurans of IKD-8344
作者:Wanlong Jiang、Douglas A. Lantrip、P. L. Fuchs
DOI:10.1021/ol005791o
日期:2000.7.1
[GRAPHICS]Enantiopure epoxy cycloheptenyl sulfones syn-7b and anti-7b are prepared in five high-yielding and stereospecific operations from 1,3-cycloheptadiene, These substrates serve as effective precursors for cis- and trans-substituted tetrahydrofurans (12, 10) which are segments of the antineoplastic agent IKD-8344.