Total synthesis of (+)-dienomycin C was achieved via Sharpless asymmetric epoxidation. Pd-catalyzed hydrogenolysis with formic salt, and Pd(II)-catalyzed cyclization of urethane. (C) 2010 Elsevier Ltd. All rights reserved.
Enantioselective Synthesis of α-Alkyl,α-Vinyl Amino Acids via [2,3]-Sigmatropic Rearrangement of Selenimides
作者:Alan Armstrong、Daniel P. G. Emmerson
DOI:10.1021/ol1030926
日期:2011.3.4
Chiral α-alkyl,α-vinyl amino acids (quaternary vinyl glycine derivatives) are prepared with high levels of enantiomeric purity by [2,3]-sigmatropicrearrangement of allylic selenimides. The required trisubstituted allylic selenides are prepared by an organocatalytic α-selenenylation of aldehydes followed by Horner−Wadsworth−Emmons (HWE) olefination. Both (E)-and (Z)-geometrical isomers are available
Synthesis of Migrastatin Analogues as Inhibitors of Tumour Cell Migration: Exploring Structural Change in and on the Macrocyclic Ring
作者:Daniele Lo Re、Ying Zhou、Joanna Mucha、Leigh F. Jones、Lorraine Leahy、Corrado Santocanale、Magdalena Krol、Paul V. Murphy
DOI:10.1002/chem.201502861
日期:2015.12.7
Migrastatin and isomigrastatin analogues have been synthesised in order to contribute to structure–activity studies on tumour cell migration inhibitors. These include macrocycles varying in ring size, functionality and alkene stereochemistry, as well as glucuronides. The synthesis work included application of the Saegusa–Ito reaction for regio‐ and stereoselective unsaturated macroketone formation
Furan Oxidation Strategy for the Synthesis of the Macrolactone Analogue of Migrastatin
作者:Yougant Airan、Kavirayani R. Prasad
DOI:10.1021/acs.joc.9b02413
日期:2019.11.15
Synthesis of the 14-membered macrolide core of migrastatin is accomplished by the use of furyl carbinol in 13 linear steps from furfural with ∼11% overall yield. Key strategies in the synthesis include the oxidative ring opening of furan and its use as a four-carbon synthon, SN2 displacement of a functionalized allyl bromide, and ring closing metathesis to obtain the macrolactone.
Asymmetric Total Synthesis of Propindilactone G, Part 3: The Final Phase and Completion of the Synthesis
作者:Xin-Ting Liang、Lin You、Yuan-He Li、Hai-Xin Yu、Jia-Hua Chen、Zhen Yang
DOI:10.1002/asia.201600131
日期:2016.5.6
final phase of the asymmetric total synthesis of propindilactone G (1). The key steps that led to the completion of the asymmetric total synthesis included: 1) an intermolecular oxidative heterocoupling reaction of enolsilanes to link the core structure to the side chain; 2) an intermolecular Wittig reaction for the formation of the α,β,γ,δ‐unsaturated ester; and 3) a regio‐ and stereoselective OsO4‐catalyzed
Dehydroamino acid (Dhaa) is recognized as a useful tool or substrate for amino acid and peptide research. Although the stereoselective synthesis of the thermodynamically more stable Z-Dhaa has been well examined and established, the stereoselective synthesis of E-Dhaa has still remained to be a challenging synthetic task. In this paper, a stereoselective synthesis of E-Dhaa esters using a new (α-d
脱氢氨基酸 (Dhaa) 被认为是氨基酸和肽研究的有用工具或底物。尽管热力学上更稳定的 Z-Dhaa 的立体选择性合成已得到充分研究和确立,但 E-Dhaa 的立体选择性合成仍然是一项具有挑战性的合成任务。在本文中,描述了使用新的(α-二苯基膦酰基)甘氨酸立体选择性合成 E-Dhaa 酯。新方法的特征方面总结如下:(i)金属添加剂在促进 E 立体选择性方面起着重要作用。(ii) NaI 用于合成带有芳基取代基和氨基官能团的 E-Dhaas,