Stereocontrolled Synthesis of the Spiro Ketal Unit of Avermectin B1a Aglycon
A stereocontrolled total synthesis of the 1,7- dioxaspiro[5.5]undecene subunit of the avermectin Bla aglycon is presented based on the “chiron” approach which utilizes optically active starting materials. © 1983, American Chemical Society. All rights reserved.
Hanessian, S; Ugolini, A; Therien, M
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