منابع مشابه
Stereoselective synthesis of (-)-spicigerolide.
(-)-Spicigerolide was stereoselectively synthesized from a protected (S)-lactaldehyde. The synthesis of the polyacetylated framework relied on two Zn-mediated stereoselective additions of alkynes to aldehydes as well as a regiocontrolled [3,3]-sigmatropic rearrangement of an allylic acetate. The pyranone moiety was constructed via ring-closing metathesis.
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This chapter offers a general review of the evolvement of methods for the stereoselective synthesis of Z-alkenes, with a focus on the development of catalytic systems towards this goal in recent years.
متن کاملStereoselective synthesis of (-)-acanthoic acid.
[reaction: see text] The first stereoselective synthesis of (-)-acanthoic acid (1) has been designed and accomplished. Our synthetic plan departs from (-) Wieland-Miesher ketone (7) and calls upon a Diels-Alder cycloaddition reaction for the construction of the C ring of 1. The described synthesis confirms the proposed stereochemistry of 1 and represents an efficient entry into an unexplored cl...
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Pseudomonas putia'a oxidation of benzene affords cis-3,5-cyclohexadiene1,2diol (JJ which serves as a novel precursor for the syntheses of several natural products including (+)-pinitol, (+)-condunto1 F, D-(-)-myo-inositol 1,4,5-trisphosphate and Dmyo-inositol 1-phosphate. The versatility of this approach is further demonstrated by the preparation of other functionalised cyclitol derivatives, in...
متن کاملStereoselective Total Synthesis of Dodoneine
Introduction. – The 6-substituted 5,6-dihydro-2H-pyran-2-one A, an a,b-unsaturated d-lactone, is an important structural subunit in many biologically promising natural products. This unit is of interest for a wide variety of biological activities, such as insect-growth inhibitors and insect antifeedent, cytotoxic activities, and antifungal and antitumor properties [1]. The pyran units are widel...
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ژورنال
عنوان ژورنال: Synthesis
سال: 1995
ISSN: 0039-7881,1437-210X
DOI: 10.1055/s-1995-3988