Homoallylic chiral induction in the synthesis of 2,4-disubstituted tetrahydrofurans by iodoetherification. Synthetic scope and chiral induction mechanism
Preparation of ethyl 5(s),6-epoxy-3(r)-(methoxymethoxy)hexanoate: a key chiral intermediate for mevinolin and compactin.
作者:Yvan Guindon、Christiane Yoakim、Michael A. Bernstein、Howard E. Morton
DOI:10.1016/s0040-4039(00)98429-6
日期:1985.1
The synthesis of Ethyl 5(S),6-Epoxy-3(R)-(methoxymethoxy)hexanoate, a key chiral synthon for the β-hydroxy-δ-lactone portion of Mevinolin and Compactin, via a regiospecific ring opening of a tetrahydrofuran derivative by dimethylboron bromide, is described.
Synthetic utility of chiral tetrahydrofurans: Preparation of (1R, 3R, 5S)-1, 3-dimethyl-2, 9-dioxabicyclo[3.3.1]nonane
作者:Yvan Guindon、Yves St. Denis、Sylvain Daigneault、Howard E. Morton
DOI:10.1016/s0040-4039(00)84226-4
日期:1986.1
The use of the iodoetherification reaction for the selective preparation of optically active -2,4-disubstituted tetrahydrofurans and the use of the latter compounds as precursors of -1,3-diols is exemplified in the synthesis of (1R, 3R, 5S)--1,3-Dimethyl-2,9-Dioxabicyclo [3.3.1]nonane().
Studies on the total synthesis of macrolactin A. A stereoselective synthesis of the C3–C13 and C14–C24 fragments
作者:Shukun Li、Rui Xu、Donglu Bai
DOI:10.1016/s0040-4039(00)00412-3
日期:2000.4
Synthetic studies towards the C3–C13 (2) and C14–C24 (3) segments of the potent antiviral and antitumor compound macrolactin A (1) are presented. Segment 2 was constructed via a convergent and facile approach, exploiting Wittig olefination to generate the sensitive E,Z-diene moiety. Segment 3 was obtained from the chiral pool derived sulfone 4 via an α-alkylation–desulfonation reaction sequence.
Formal Synthesis of (+)-Brefeldin A: Application of a Zinc-Mediated Ring Expansion Reaction
作者:Weimin Lin、Charles K. Zercher
DOI:10.1021/jo0701379
日期:2007.6.1
formal synthesis of (+)-brefeldin A was accomplished through a synthetic approach that relied upon three keys steps. The five-membered ring was generated in a stereocontrolled fashion through application of a tandem conjugate addition-intramolecular cyclization method developed by Toru. Ring-closingmetathesis provided access to a twelve-membered β-keto lactone, which was ring-expanded to the α,β-unsaturated-γ-keto