Synthesis of .beta.-resorcylic macrolides via organopalladium chemistry. Application to the total synthesis of (S)-zearalenone
摘要:
The beta-resorcylic macrolides are a class of naturally occurring 12- and 14-membered macrolides. Zearalenone (1), a 14-membered macrolide of this type, displays useful biological activity, which has led to great synthetic interest. In this paper the intramolecular coupling reaction of an organostannane with an electrophile is used to construct beta-resorcylic macrolides. The intramolecular coupling of an aryl iodide with a vinylstannane provided the highest yield of lactones. This methodology was then used to prepare (S)-zearalenone (1).
Total Syntheses of (<i>S</i>)-(−)-Zearalenone and Lasiodiplodin Reveal Superior Metathesis Activity of Ruthenium Carbene Complexes with Imidazol-2-ylidene Ligands
作者:Alois Fürstner、Oliver R. Thiel、Nicole Kindler、Beata Bartkowska
DOI:10.1021/jo0009999
日期:2000.11.1
can be obtained either via a Stille cross-coupling reaction of tributylvinylstannane or, even more efficiently, by Heck reactions of the aryl triflate precursors with pressurized ethene. Furthermore, the synthesis of 1 via RCM is compared with an alternative approach employing a low-valent titanium-induced McMurry coupling of dialdehyde 47 for the formation of the large ring. This direct comparison
Synthesis of .beta.-resorcylic macrolides via organopalladium chemistry. Application to the total synthesis of (S)-zearalenone
作者:A. Kalivretenos、J. K. Stille、L. S. Hegedus
DOI:10.1021/jo00008a053
日期:1991.4
The beta-resorcylic macrolides are a class of naturally occurring 12- and 14-membered macrolides. Zearalenone (1), a 14-membered macrolide of this type, displays useful biological activity, which has led to great synthetic interest. In this paper the intramolecular coupling reaction of an organostannane with an electrophile is used to construct beta-resorcylic macrolides. The intramolecular coupling of an aryl iodide with a vinylstannane provided the highest yield of lactones. This methodology was then used to prepare (S)-zearalenone (1).
Chemoenzymatic macrocycle synthesis using resorcylic acid lactone thioesterase domains
作者:Graham W. Heberlig、Jesse T. C. Brown、Ryan D. Simard、Monica Wirz、Wei Zhang、Meng Wang、Leah I. Susser、Mark E. Horsman、Christopher N. Boddy
DOI:10.1039/c8ob01512k
日期:——
discovery via the native macrocycle forming biosynthetic mechanism. Herein we demonstrate that the thioesterase domains (TEs) responsible for macrocyclization of resorcylicacidlactones are promising catalysts for the chemoenzymatic synthesis of 12- to 18-member ring macrolactones and macrolactams. The TE domains responsible for zearalenone and radicicol biosynthesis successfully generate resorcylate-like